diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44128a4..67dfa41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 2.1.2 (July 11, 2024)
+
+- Fix: Don't url-encode parameters to `/oauth` endpoints
+
 # 2.1.1 (April 24, 2024)
 
 - Fix: Tell Faraday to use JSON for the request
diff --git a/lib/pco/api/endpoint.rb b/lib/pco/api/endpoint.rb
index 3ade7a3..87b2a9e 100644
--- a/lib/pco/api/endpoint.rb
+++ b/lib/pco/api/endpoint.rb
@@ -52,7 +52,7 @@ def get(params = {})
 
       def post(body = {})
         @last_result = @connection.post(@url) do |req|
-          req.body = _build_body(body)
+          req.body = body.to_json
         end
         _build_response(@last_result)
       rescue Errors::TooManyRequests => e
@@ -61,7 +61,7 @@ def post(body = {})
 
       def patch(body = {})
         @last_result = @connection.patch(@url) do |req|
-          req.body = _build_body(body)
+          req.body = body.to_json
         end
         _build_response(@last_result)
       rescue Errors::TooManyRequests => e
@@ -116,18 +116,6 @@ def _build_response(result)
         end
       end
 
-      def _build_body(body)
-        if _needs_url_encoded?
-          Faraday::Utils.build_nested_query(body)
-        else
-          body.to_json
-        end
-      end
-
-      def _needs_url_encoded?
-        @url =~ /oauth\/[a-z]+\z/
-      end
-
       def _build_endpoint(path)
         @cache[path] ||= begin
           self.class.new(
diff --git a/lib/pco/api/version.rb b/lib/pco/api/version.rb
index b2af64f..13cdfc3 100644
--- a/lib/pco/api/version.rb
+++ b/lib/pco/api/version.rb
@@ -1,5 +1,5 @@
 module PCO
   module API
-    VERSION = '2.1.1'
+    VERSION = '2.1.2'
   end
 end