diff --git a/src/main/java/org/warp/commonutils/moshi/MoshiPolymorphic.java b/src/main/java/org/warp/commonutils/moshi/MoshiPolymorphic.java
index 26f5031..73e1001 100644
--- a/src/main/java/org/warp/commonutils/moshi/MoshiPolymorphic.java
+++ b/src/main/java/org/warp/commonutils/moshi/MoshiPolymorphic.java
@@ -49,12 +49,14 @@ public abstract class MoshiPolymorphic<OBJ> {
 			var concreteClasses = getConcreteClasses();
 			var extraAdapters = getExtraAdapters();
 
+			extraAdapters.forEach(abstractMoshiBuilder::addLast);
+
 			for (Class<?> declaredClass : abstractClasses) {
 				var name = fixType(declaredClass.getSimpleName());
 				JsonAdapter<OBJ> adapter = new PolymorphicAdapter<>(name);
 				abstractClassesSerializers.put(declaredClass, adapter);
 				customAdapters.put(name, adapter);
-				abstractMoshiBuilder.add(declaredClass, adapter);
+				abstractMoshiBuilder.addLast(declaredClass, adapter);
 			}
 
 			for (Class<?> declaredClass : concreteClasses) {
@@ -62,12 +64,10 @@ public abstract class MoshiPolymorphic<OBJ> {
 				JsonAdapter<OBJ> adapter = new NormalValueAdapter<>(name, declaredClass);
 				concreteClassesSerializers.put(declaredClass, adapter);
 				customAdapters.put(name, adapter);
-				abstractMoshiBuilder.add(declaredClass, adapter);
+				abstractMoshiBuilder.addLast(declaredClass, adapter);
 			}
 
-			extraAdapters.forEach(abstractMoshiBuilder::add);
-
-			abstractMoshiBuilder.add(new RecordsJsonAdapterFactory());
+			abstractMoshiBuilder.addLast(new RecordsJsonAdapterFactory());
 
 			abstractMoshi = abstractMoshiBuilder.build();
 		}