diff --git a/src/better_sqlite3.cpp b/src/better_sqlite3.cpp
index 4b93ab5f..1addc7f4 100644
--- a/src/better_sqlite3.cpp
+++ b/src/better_sqlite3.cpp
@@ -2,7 +2,7 @@
 //
 
 #include "better_sqlite3.hpp"
-#line 153 "./src/util/macros.lzz"
+#line 150 "./src/util/macros.lzz"
 void SetPrototypeGetter(
 	v8::Isolate* isolate,
 	v8::Local<v8::External> data,
@@ -11,7 +11,7 @@ void SetPrototypeGetter(
 	v8::AccessorGetterCallback func
 ) {
 	v8::HandleScope scope(isolate);
-	
+
 	#if defined NODE_MODULE_VERSION && NODE_MODULE_VERSION < 121
 	recv->InstanceTemplate()->SetAccessor(
 		InternalizedFromLatin1(isolate, name),
@@ -30,7 +30,7 @@ void SetPrototypeGetter(
 	);
 	#endif
 }
-#line 183 "./src/util/macros.lzz"
+#line 180 "./src/util/macros.lzz"
 #ifndef V8_COMPRESS_POINTERS_IN_SHARED_CAGE
 #define SAFE_NEW_BUFFER(env, data, length, finalizeCallback, finalizeHint) node::Buffer::New(env, data, length, finalizeCallback, finalizeHint)
 #else
@@ -103,33 +103,33 @@ namespace Data
 #line 70 "./src/util/data.lzz"
   static char const RAW = 3;
 }
-#line 37 "./src/util/macros.lzz"
+#line 34 "./src/util/macros.lzz"
 void ThrowError (char const * message)
-#line 37 "./src/util/macros.lzz"
+#line 34 "./src/util/macros.lzz"
                                      { v8 :: Isolate * isolate = v8 :: Isolate :: GetCurrent ( ) ; isolate->ThrowException(v8::Exception::Error(StringFromUtf8(isolate, message, -1)));
 }
-#line 38 "./src/util/macros.lzz"
+#line 35 "./src/util/macros.lzz"
 void ThrowTypeError (char const * message)
-#line 38 "./src/util/macros.lzz"
+#line 35 "./src/util/macros.lzz"
                                          { v8 :: Isolate * isolate = v8 :: Isolate :: GetCurrent ( ) ; isolate->ThrowException(v8::Exception::TypeError(StringFromUtf8(isolate, message, -1)));
 }
-#line 39 "./src/util/macros.lzz"
+#line 36 "./src/util/macros.lzz"
 void ThrowRangeError (char const * message)
-#line 39 "./src/util/macros.lzz"
+#line 36 "./src/util/macros.lzz"
                                           { v8 :: Isolate * isolate = v8 :: Isolate :: GetCurrent ( ) ; isolate->ThrowException(v8::Exception::RangeError(StringFromUtf8(isolate, message, -1)));
 }
-#line 105 "./src/util/macros.lzz"
+#line 102 "./src/util/macros.lzz"
 v8::Local <v8::FunctionTemplate> NewConstructorTemplate (v8::Isolate * isolate, v8::Local <v8::External> data, v8::FunctionCallback func, char const * name)
-#line 110 "./src/util/macros.lzz"
+#line 107 "./src/util/macros.lzz"
   {
         v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New(isolate, func, data);
         t->InstanceTemplate()->SetInternalFieldCount(1);
         t->SetClassName(InternalizedFromLatin1(isolate, name));
         return t;
 }
-#line 116 "./src/util/macros.lzz"
+#line 113 "./src/util/macros.lzz"
 void SetPrototypeMethod (v8::Isolate * isolate, v8::Local <v8::External> data, v8::Local <v8::FunctionTemplate> recv, char const * name, v8::FunctionCallback func)
-#line 122 "./src/util/macros.lzz"
+#line 119 "./src/util/macros.lzz"
   {
         v8::HandleScope scope(isolate);
         recv->PrototypeTemplate()->Set(
@@ -137,9 +137,9 @@ void SetPrototypeMethod (v8::Isolate * isolate, v8::Local <v8::External> data, v
                 v8::FunctionTemplate::New(isolate, func, data, v8::Signature::New(isolate, recv))
         );
 }
-#line 129 "./src/util/macros.lzz"
+#line 126 "./src/util/macros.lzz"
 void SetPrototypeSymbolMethod (v8::Isolate * isolate, v8::Local <v8::External> data, v8::Local <v8::FunctionTemplate> recv, v8::Local <v8::Symbol> symbol, v8::FunctionCallback func)
-#line 135 "./src/util/macros.lzz"
+#line 132 "./src/util/macros.lzz"
   {
         v8::HandleScope scope(isolate);
         recv->PrototypeTemplate()->Set(
@@ -267,9 +267,9 @@ CS::CS (v8::Isolate * isolate)
                 SetCode(isolate, SQLITE_OK_LOAD_PERMANENTLY, "SQLITE_OK_LOAD_PERMANENTLY");
 }
 #line 140 "./src/util/constants.lzz"
-void CS::SetString (v8::Isolate * isolate, CopyablePersistent <v8::String> & constant, char const * str)
+void CS::SetString (v8::Isolate * isolate, v8::Global <v8::String> & constant, char const * str)
 #line 140 "./src/util/constants.lzz"
-                                                                                                               {
+                                                                                                       {
                 constant.Reset(isolate, InternalizedFromLatin1(isolate, str));
 }
 #line 144 "./src/util/constants.lzz"
diff --git a/src/better_sqlite3.hpp b/src/better_sqlite3.hpp
index 44bef308..99db7bdc 100644
--- a/src/better_sqlite3.hpp
+++ b/src/better_sqlite3.hpp
@@ -16,9 +16,7 @@
 #include <node.h>
 #include <node_object_wrap.h>
 #include <node_buffer.h>
-#line 31 "./src/util/macros.lzz"
-template <class T> using CopyablePersistent = v8::Global<T>;
-#line 144 "./src/util/macros.lzz"
+#line 141 "./src/util/macros.lzz"
 void SetPrototypeGetter(
 	v8::Isolate* isolate,
 	v8::Local<v8::External> data,
@@ -37,29 +35,29 @@ v8::Local <v8::String> InternalizedFromUtf8 (v8::Isolate * isolate, char const *
 v8::Local <v8::Value> InternalizedFromUtf8OrNull (v8::Isolate * isolate, char const * data, int length);
 #line 26 "./src/util/macros.lzz"
 v8::Local <v8::String> InternalizedFromLatin1 (v8::Isolate * isolate, char const * str);
-#line 33 "./src/util/macros.lzz"
-void SetFrozen (v8::Isolate * isolate, v8::Local <v8::Context> ctx, v8::Local <v8::Object> obj, CopyablePersistent <v8::String> & key, v8::Local <v8::Value> value);
-#line 37 "./src/util/macros.lzz"
+#line 30 "./src/util/macros.lzz"
+void SetFrozen (v8::Isolate * isolate, v8::Local <v8::Context> ctx, v8::Local <v8::Object> obj, v8::Global <v8::String> & key, v8::Local <v8::Value> value);
+#line 34 "./src/util/macros.lzz"
 void ThrowError (char const * message);
-#line 38 "./src/util/macros.lzz"
+#line 35 "./src/util/macros.lzz"
 void ThrowTypeError (char const * message);
-#line 39 "./src/util/macros.lzz"
+#line 36 "./src/util/macros.lzz"
 void ThrowRangeError (char const * message);
-#line 91 "./src/util/macros.lzz"
+#line 88 "./src/util/macros.lzz"
 bool IS_SKIPPED (char c);
-#line 96 "./src/util/macros.lzz"
+#line 93 "./src/util/macros.lzz"
 template <typename T>
-#line 96 "./src/util/macros.lzz"
+#line 93 "./src/util/macros.lzz"
 T * ALLOC_ARRAY (size_t count);
-#line 101 "./src/util/macros.lzz"
+#line 98 "./src/util/macros.lzz"
 template <typename T>
-#line 101 "./src/util/macros.lzz"
+#line 98 "./src/util/macros.lzz"
 void FREE_ARRAY (T * array_pointer);
-#line 105 "./src/util/macros.lzz"
+#line 102 "./src/util/macros.lzz"
 v8::Local <v8::FunctionTemplate> NewConstructorTemplate (v8::Isolate * isolate, v8::Local <v8::External> data, v8::FunctionCallback func, char const * name);
-#line 116 "./src/util/macros.lzz"
+#line 113 "./src/util/macros.lzz"
 void SetPrototypeMethod (v8::Isolate * isolate, v8::Local <v8::External> data, v8::Local <v8::FunctionTemplate> recv, char const * name, v8::FunctionCallback func);
-#line 129 "./src/util/macros.lzz"
+#line 126 "./src/util/macros.lzz"
 void SetPrototypeSymbolMethod (v8::Isolate * isolate, v8::Local <v8::External> data, v8::Local <v8::FunctionTemplate> recv, v8::Local <v8::Symbol> symbol, v8::FunctionCallback func);
 #line 1 "./src/util/constants.lzz"
 class CS
@@ -71,49 +69,49 @@ class CS
 #line 10 "./src/util/constants.lzz"
   explicit CS (v8::Isolate * isolate);
 #line 119 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> database;
+  v8::Global <v8::String> database;
 #line 120 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> reader;
+  v8::Global <v8::String> reader;
 #line 121 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> source;
+  v8::Global <v8::String> source;
 #line 122 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> memory;
+  v8::Global <v8::String> memory;
 #line 123 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> readonly;
+  v8::Global <v8::String> readonly;
 #line 124 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> name;
+  v8::Global <v8::String> name;
 #line 125 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> next;
+  v8::Global <v8::String> next;
 #line 126 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> length;
+  v8::Global <v8::String> length;
 #line 127 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> done;
+  v8::Global <v8::String> done;
 #line 128 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> value;
+  v8::Global <v8::String> value;
 #line 129 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> changes;
+  v8::Global <v8::String> changes;
 #line 130 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> lastInsertRowid;
+  v8::Global <v8::String> lastInsertRowid;
 #line 131 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> statement;
+  v8::Global <v8::String> statement;
 #line 132 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> column;
+  v8::Global <v8::String> column;
 #line 133 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> table;
+  v8::Global <v8::String> table;
 #line 134 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> type;
+  v8::Global <v8::String> type;
 #line 135 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> totalPages;
+  v8::Global <v8::String> totalPages;
 #line 136 "./src/util/constants.lzz"
-  CopyablePersistent <v8::String> remainingPages;
+  v8::Global <v8::String> remainingPages;
 #line 138 "./src/util/constants.lzz"
 private:
 #line 140 "./src/util/constants.lzz"
-  static void SetString (v8::Isolate * isolate, CopyablePersistent <v8::String> & constant, char const * str);
+  static void SetString (v8::Isolate * isolate, v8::Global <v8::String> & constant, char const * str);
 #line 144 "./src/util/constants.lzz"
   void SetCode (v8::Isolate * isolate, int code, char const * str);
 #line 150 "./src/util/constants.lzz"
-  std::unordered_map <int, CopyablePersistent<v8::String> > codes;
+  std::unordered_map <int, v8::Global<v8::String> > codes;
 };
 #line 1 "./src/util/bind-map.lzz"
 class BindMap
@@ -138,7 +136,7 @@ class BindMap
 #line 22 "./src/util/bind-map.lzz"
     explicit Pair (v8::Isolate * isolate, Pair * pair);
 #line 25 "./src/util/bind-map.lzz"
-    CopyablePersistent <v8::String> const name;
+    v8::Global <v8::String> const name;
 #line 26 "./src/util/bind-map.lzz"
     int const index;
   };
@@ -305,7 +303,7 @@ class Database : public node::ObjectWrap
 #line 464 "./src/objects/database.lzz"
   Addon * const addon;
 #line 465 "./src/objects/database.lzz"
-  CopyablePersistent <v8::Value> const logger;
+  v8::Global <v8::Value> const logger;
 #line 466 "./src/objects/database.lzz"
   std::set <Statement*, CompareStatement> stmts;
 #line 467 "./src/objects/database.lzz"
@@ -519,7 +517,7 @@ class CustomFunction : protected DataConverter
 #line 56 "./src/util/custom-function.lzz"
   v8::Isolate * const isolate;
 #line 57 "./src/util/custom-function.lzz"
-  CopyablePersistent <v8::Function> const fn;
+  v8::Global <v8::Function> const fn;
 #line 58 "./src/util/custom-function.lzz"
   bool const safe_ints;
 };
@@ -541,7 +539,7 @@ class CustomAggregate : public CustomFunction
 #line 37 "./src/util/custom-aggregate.lzz"
 private:
 #line 39 "./src/util/custom-aggregate.lzz"
-  static void xStepBase (sqlite3_context * invocation, int argc, sqlite3_value * * argv, CopyablePersistent <v8::Function> const CustomAggregate::* ptrtm);
+  static void xStepBase (sqlite3_context * invocation, int argc, sqlite3_value * * argv, v8::Global <v8::Function> const CustomAggregate::* ptrtm);
 #line 58 "./src/util/custom-aggregate.lzz"
   static void xValueBase (sqlite3_context * invocation, bool is_final);
 #line 82 "./src/util/custom-aggregate.lzz"
@@ -550,7 +548,7 @@ class CustomAggregate : public CustomFunction
 #line 82 "./src/util/custom-aggregate.lzz"
   public:
 #line 83 "./src/util/custom-aggregate.lzz"
-    CopyablePersistent <v8::Value> value;
+    v8::Global <v8::Value> value;
 #line 84 "./src/util/custom-aggregate.lzz"
     bool initialized;
 #line 85 "./src/util/custom-aggregate.lzz"
@@ -567,11 +565,11 @@ class CustomAggregate : public CustomFunction
 #line 117 "./src/util/custom-aggregate.lzz"
   bool const invoke_start;
 #line 118 "./src/util/custom-aggregate.lzz"
-  CopyablePersistent <v8::Function> const inverse;
+  v8::Global <v8::Function> const inverse;
 #line 119 "./src/util/custom-aggregate.lzz"
-  CopyablePersistent <v8::Function> const result;
+  v8::Global <v8::Function> const result;
 #line 120 "./src/util/custom-aggregate.lzz"
-  CopyablePersistent <v8::Value> const start;
+  v8::Global <v8::Value> const start;
 };
 #line 1 "./src/util/custom-table.lzz"
 class CustomTable
@@ -608,7 +606,7 @@ class CustomTable
 #line 103 "./src/util/custom-table.lzz"
     bool const safe_ints;
 #line 104 "./src/util/custom-table.lzz"
-    CopyablePersistent <v8::Function> const generator;
+    v8::Global <v8::Function> const generator;
 #line 105 "./src/util/custom-table.lzz"
     std::vector <std::string> const parameter_names;
   };
@@ -626,11 +624,11 @@ class CustomTable
 #line 122 "./src/util/custom-table.lzz"
     sqlite3_vtab_cursor base;
 #line 123 "./src/util/custom-table.lzz"
-    CopyablePersistent <v8::Object> iterator;
+    v8::Global <v8::Object> iterator;
 #line 124 "./src/util/custom-table.lzz"
-    CopyablePersistent <v8::Function> next;
+    v8::Global <v8::Function> next;
 #line 125 "./src/util/custom-table.lzz"
-    CopyablePersistent <v8::Array> row;
+    v8::Global <v8::Array> row;
 #line 126 "./src/util/custom-table.lzz"
     bool done;
 #line 127 "./src/util/custom-table.lzz"
@@ -685,7 +683,7 @@ class CustomTable
 #line 402 "./src/util/custom-table.lzz"
   std::string const name;
 #line 403 "./src/util/custom-table.lzz"
-  CopyablePersistent <v8::Function> const factory;
+  v8::Global <v8::Function> const factory;
 };
 #line 65 "./src/util/data.lzz"
 namespace Data
@@ -793,13 +791,13 @@ struct Addon
 #line 52 "./src/better_sqlite3.lzz"
   sqlite3_uint64 NextId ();
 #line 56 "./src/better_sqlite3.lzz"
-  CopyablePersistent <v8::Function> Statement;
+  v8::Global <v8::Function> Statement;
 #line 57 "./src/better_sqlite3.lzz"
-  CopyablePersistent <v8::Function> StatementIterator;
+  v8::Global <v8::Function> StatementIterator;
 #line 58 "./src/better_sqlite3.lzz"
-  CopyablePersistent <v8::Function> Backup;
+  v8::Global <v8::Function> Backup;
 #line 59 "./src/better_sqlite3.lzz"
-  CopyablePersistent <v8::Function> SqliteError;
+  v8::Global <v8::Function> SqliteError;
 #line 60 "./src/better_sqlite3.lzz"
   v8::FunctionCallbackInfo <v8 :: Value> const * privileged_info;
 #line 61 "./src/better_sqlite3.lzz"
@@ -834,31 +832,31 @@ LZZ_INLINE v8::Local <v8::String> InternalizedFromLatin1 (v8::Isolate * isolate,
                                                                                            {
         return v8::String::NewFromOneByte(isolate, reinterpret_cast<const uint8_t*>(str), v8::NewStringType::kInternalized).ToLocalChecked();
 }
-#line 33 "./src/util/macros.lzz"
-LZZ_INLINE void SetFrozen (v8::Isolate * isolate, v8::Local <v8::Context> ctx, v8::Local <v8::Object> obj, CopyablePersistent <v8::String> & key, v8::Local <v8::Value> value)
-#line 33 "./src/util/macros.lzz"
-                                                                                                                                                                    {
+#line 30 "./src/util/macros.lzz"
+LZZ_INLINE void SetFrozen (v8::Isolate * isolate, v8::Local <v8::Context> ctx, v8::Local <v8::Object> obj, v8::Global <v8::String> & key, v8::Local <v8::Value> value)
+#line 30 "./src/util/macros.lzz"
+                                                                                                                                                            {
         obj->DefineOwnProperty(ctx, key.Get(isolate), value, static_cast<v8::PropertyAttribute>(v8::DontDelete | v8::ReadOnly)).FromJust();
 }
-#line 91 "./src/util/macros.lzz"
+#line 88 "./src/util/macros.lzz"
 LZZ_INLINE bool IS_SKIPPED (char c)
-#line 91 "./src/util/macros.lzz"
+#line 88 "./src/util/macros.lzz"
                                {
         return c == ' ' || c == ';' || (c >= '\t' && c <= '\r');
 }
-#line 96 "./src/util/macros.lzz"
+#line 93 "./src/util/macros.lzz"
 template <typename T>
-#line 96 "./src/util/macros.lzz"
+#line 93 "./src/util/macros.lzz"
 LZZ_INLINE T * ALLOC_ARRAY (size_t count)
-#line 96 "./src/util/macros.lzz"
+#line 93 "./src/util/macros.lzz"
                                                       {
         return static_cast<T*>(::operator new[](count * sizeof(T)));
 }
-#line 101 "./src/util/macros.lzz"
+#line 98 "./src/util/macros.lzz"
 template <typename T>
-#line 101 "./src/util/macros.lzz"
+#line 98 "./src/util/macros.lzz"
 LZZ_INLINE void FREE_ARRAY (T * array_pointer)
-#line 101 "./src/util/macros.lzz"
+#line 98 "./src/util/macros.lzz"
                                                            {
         ::operator delete[](array_pointer);
 }
@@ -952,9 +950,9 @@ LZZ_INLINE bool Backup::Compare (Backup const * const a, Backup const * const b)
                 return a->id < b->id;
 }
 #line 39 "./src/util/custom-aggregate.lzz"
-LZZ_INLINE void CustomAggregate::xStepBase (sqlite3_context * invocation, int argc, sqlite3_value * * argv, CopyablePersistent <v8::Function> const CustomAggregate::* ptrtm)
+LZZ_INLINE void CustomAggregate::xStepBase (sqlite3_context * invocation, int argc, sqlite3_value * * argv, v8::Global <v8::Function> const CustomAggregate::* ptrtm)
 #line 39 "./src/util/custom-aggregate.lzz"
-                                                                                                                                                                  {
+                                                                                                                                                          {
                 CustomAggregate * self = static_cast < CustomAggregate * > ( sqlite3_user_data ( invocation ) ) ; v8 :: Isolate * isolate = self -> isolate ; v8 :: HandleScope scope ( isolate ) ; Accumulator * acc = self -> GetAccumulator ( invocation ) ; if ( acc -> value . IsEmpty ( ) ) return ;
 
                 v8::Local<v8::Value> args_fast[5];
diff --git a/src/better_sqlite3.lzz b/src/better_sqlite3.lzz
index aae5d10a..430991fc 100644
--- a/src/better_sqlite3.lzz
+++ b/src/better_sqlite3.lzz
@@ -53,10 +53,10 @@ struct Addon {
 		return next_id++;
 	}
 
-	CopyablePersistent<v8::Function> Statement;
-	CopyablePersistent<v8::Function> StatementIterator;
-	CopyablePersistent<v8::Function> Backup;
-	CopyablePersistent<v8::Function> SqliteError;
+	v8::Global<v8::Function> Statement;
+	v8::Global<v8::Function> StatementIterator;
+	v8::Global<v8::Function> Backup;
+	v8::Global<v8::Function> SqliteError;
 	NODE_ARGUMENTS_POINTER privileged_info;
 	sqlite3_uint64 next_id;
 	CS cs;
diff --git a/src/objects/database.lzz b/src/objects/database.lzz
index 14e80f70..28294fa3 100644
--- a/src/objects/database.lzz
+++ b/src/objects/database.lzz
@@ -462,7 +462,7 @@ private:
 	const bool has_logger;
 	unsigned short iterators;
 	Addon* const addon;
-	const CopyablePersistent<v8::Value> logger;
+	const v8::Global<v8::Value> logger;
 	std::set<Statement*, CompareStatement> stmts;
 	std::set<Backup*, CompareBackup> backups;
 };
diff --git a/src/util/bind-map.lzz b/src/util/bind-map.lzz
index 66a73f13..766d0f94 100644
--- a/src/util/bind-map.lzz
+++ b/src/util/bind-map.lzz
@@ -22,7 +22,7 @@ public:
 			explicit Pair(v8::Isolate* isolate, Pair* pair)
 				: name(isolate, pair->name), index(pair->index) {}
 
-			const CopyablePersistent<v8::String> name;
+			const v8::Global<v8::String> name;
 			const int index;
 	};
 
diff --git a/src/util/constants.lzz b/src/util/constants.lzz
index e1123c2f..94b3a52b 100644
--- a/src/util/constants.lzz
+++ b/src/util/constants.lzz
@@ -116,28 +116,28 @@ public:
 		SetCode(isolate, SQLITE_OK_LOAD_PERMANENTLY, "SQLITE_OK_LOAD_PERMANENTLY");
 	}
 
-	CopyablePersistent<v8::String> database;
-	CopyablePersistent<v8::String> reader;
-	CopyablePersistent<v8::String> source;
-	CopyablePersistent<v8::String> memory;
-	CopyablePersistent<v8::String> readonly;
-	CopyablePersistent<v8::String> name;
-	CopyablePersistent<v8::String> next;
-	CopyablePersistent<v8::String> length;
-	CopyablePersistent<v8::String> done;
-	CopyablePersistent<v8::String> value;
-	CopyablePersistent<v8::String> changes;
-	CopyablePersistent<v8::String> lastInsertRowid;
-	CopyablePersistent<v8::String> statement;
-	CopyablePersistent<v8::String> column;
-	CopyablePersistent<v8::String> table;
-	CopyablePersistent<v8::String> type;
-	CopyablePersistent<v8::String> totalPages;
-	CopyablePersistent<v8::String> remainingPages;
+	v8::Global<v8::String> database;
+	v8::Global<v8::String> reader;
+	v8::Global<v8::String> source;
+	v8::Global<v8::String> memory;
+	v8::Global<v8::String> readonly;
+	v8::Global<v8::String> name;
+	v8::Global<v8::String> next;
+	v8::Global<v8::String> length;
+	v8::Global<v8::String> done;
+	v8::Global<v8::String> value;
+	v8::Global<v8::String> changes;
+	v8::Global<v8::String> lastInsertRowid;
+	v8::Global<v8::String> statement;
+	v8::Global<v8::String> column;
+	v8::Global<v8::String> table;
+	v8::Global<v8::String> type;
+	v8::Global<v8::String> totalPages;
+	v8::Global<v8::String> remainingPages;
 
 private:
 
-	static void SetString(v8::Isolate* isolate, CopyablePersistent<v8::String>& constant, const char* str) {
+	static void SetString(v8::Isolate* isolate, v8::Global<v8::String>& constant, const char* str) {
 		constant.Reset(isolate, InternalizedFromLatin1(isolate, str));
 	}
 
@@ -147,5 +147,5 @@ private:
 			std::forward_as_tuple(isolate, InternalizedFromLatin1(isolate, str)));
 	}
 
-	std::unordered_map<int, CopyablePersistent<v8::String> > codes;
+	std::unordered_map<int, v8::Global<v8::String> > codes;
 };
diff --git a/src/util/custom-aggregate.lzz b/src/util/custom-aggregate.lzz
index ab41477a..ec52ea82 100644
--- a/src/util/custom-aggregate.lzz
+++ b/src/util/custom-aggregate.lzz
@@ -36,7 +36,7 @@ public:
 
 private:
 
-	static inline void xStepBase(sqlite3_context* invocation, int argc, sqlite3_value** argv, const CopyablePersistent<v8::Function> CustomAggregate::*ptrtm) {
+	static inline void xStepBase(sqlite3_context* invocation, int argc, sqlite3_value** argv, const v8::Global<v8::Function> CustomAggregate::*ptrtm) {
 		AGGREGATE_START();
 
 		v8::Local<v8::Value> args_fast[5];
@@ -80,7 +80,7 @@ private:
 	}
 
 	struct Accumulator { public:
-		CopyablePersistent<v8::Value> value;
+		v8::Global<v8::Value> value;
 		bool initialized;
 		bool is_window;
 	}
@@ -115,7 +115,7 @@ private:
 
 	const bool invoke_result;
 	const bool invoke_start;
-	const CopyablePersistent<v8::Function> inverse;
-	const CopyablePersistent<v8::Function> result;
-	const CopyablePersistent<v8::Value> start;
+	const v8::Global<v8::Function> inverse;
+	const v8::Global<v8::Function> result;
+	const v8::Global<v8::Value> start;
 };
diff --git a/src/util/custom-function.lzz b/src/util/custom-function.lzz
index 0f83e4c0..e9972663 100644
--- a/src/util/custom-function.lzz
+++ b/src/util/custom-function.lzz
@@ -54,6 +54,6 @@ private:
 	Database* const db;
 protected:
 	v8::Isolate* const isolate;
-	const CopyablePersistent<v8::Function> fn;
+	const v8::Global<v8::Function> fn;
 	const bool safe_ints;
 };
diff --git a/src/util/custom-table.lzz b/src/util/custom-table.lzz
index fc6fbbc6..89b7dff4 100644
--- a/src/util/custom-table.lzz
+++ b/src/util/custom-table.lzz
@@ -101,7 +101,7 @@ private:
 		CustomTable * const parent;
 		const int parameter_count;
 		const bool safe_ints;
-		const CopyablePersistent<v8::Function> generator;
+		const v8::Global<v8::Function> generator;
 		const std::vector<std::string> parameter_names;
 	};
 
@@ -120,9 +120,9 @@ private:
 		}
 
 		sqlite3_vtab_cursor base;
-		CopyablePersistent<v8::Object> iterator;
-		CopyablePersistent<v8::Function> next;
-		CopyablePersistent<v8::Array> row;
+		v8::Global<v8::Object> iterator;
+		v8::Global<v8::Function> next;
+		v8::Global<v8::Array> row;
 		bool done;
 		sqlite_int64 rowid;
 	};
@@ -400,5 +400,5 @@ private:
 	v8::Isolate* const isolate;
 	Database* const db;
 	const std::string name;
-	const CopyablePersistent<v8::Function> factory;
+	const v8::Global<v8::Function> factory;
 };
diff --git a/src/util/macros.lzz b/src/util/macros.lzz
index 4763b3c3..432c2638 100644
--- a/src/util/macros.lzz
+++ b/src/util/macros.lzz
@@ -27,10 +27,7 @@ inline v8::Local<v8::String> InternalizedFromLatin1(v8::Isolate* isolate, const
 	return v8::String::NewFromOneByte(isolate, reinterpret_cast<const uint8_t*>(str), v8::NewStringType::kInternalized).ToLocalChecked();
 }
 
-#hdr
-template <class T> using CopyablePersistent = v8::Global<T>;
-#end
-inline void SetFrozen(v8::Isolate* isolate, v8::Local<v8::Context> ctx, v8::Local<v8::Object> obj, CopyablePersistent<v8::String>& key, v8::Local<v8::Value> value) {
+inline void SetFrozen(v8::Isolate* isolate, v8::Local<v8::Context> ctx, v8::Local<v8::Object> obj, v8::Global<v8::String>& key, v8::Local<v8::Value> value) {
 	obj->DefineOwnProperty(ctx, key.Get(isolate), value, static_cast<v8::PropertyAttribute>(v8::DontDelete | v8::ReadOnly)).FromJust();
 }
 
@@ -149,7 +146,7 @@ void SetPrototypeGetter(
 	v8::AccessorGetterCallback func
 );
 #end
-#src 
+#src
 void SetPrototypeGetter(
 	v8::Isolate* isolate,
 	v8::Local<v8::External> data,
@@ -158,7 +155,7 @@ void SetPrototypeGetter(
 	v8::AccessorGetterCallback func
 ) {
 	v8::HandleScope scope(isolate);
-	
+
 	#if defined NODE_MODULE_VERSION && NODE_MODULE_VERSION < 121
 	recv->InstanceTemplate()->SetAccessor(
 		InternalizedFromLatin1(isolate, name),