diff --git a/meta/src/main/java/io/art/meta/model/MetaMethod.java b/meta/src/main/java/io/art/meta/model/MetaMethod.java
index 81cb5d9f0..b317d4135 100644
--- a/meta/src/main/java/io/art/meta/model/MetaMethod.java
+++ b/meta/src/main/java/io/art/meta/model/MetaMethod.java
@@ -47,7 +47,7 @@ protected MetaMethod(String name, MetaType<?> returnType, OwnerType owner) {
         this.parameters = map();
     }
 
-    protected <P> MetaParameter<P> register(MetaParameter<P> parameter) {
+    protected <P extends MetaParameter<?>> P register(P parameter) {
         parameters.put(parameter.name(), parameter);
         return parameter;
     }