diff --git a/src/clj_jtwig/convert.clj b/src/clj_jtwig/convert.clj
index c0c6cc0..d2d45d6 100644
--- a/src/clj_jtwig/convert.clj
+++ b/src/clj_jtwig/convert.clj
@@ -24,26 +24,6 @@
              (assoc m (to-clojure k) (to-clojure v)))
            {})))
 
-  java.lang.Number
-  (to-clojure [x]
-    x)
-
-  java.lang.Boolean
-  (to-clojure [x]
-    x)
-
-  java.lang.Character
-  (to-clojure [x]
-    x)
-
-  java.lang.String
-  (to-clojure [x]
-    x)
-
-  clojure.lang.Keyword
-  (to-clojure [x]
-    x)
-
   java.lang.Object
   (to-clojure [x]
     x