diff --git a/IdrisScript.idr b/IdrisScript.idr
index f455866..ed09ba9 100644
--- a/IdrisScript.idr
+++ b/IdrisScript.idr
@@ -81,9 +81,15 @@ interface ToJS from (to : JSType) where
 implementation ToJS String JSString where
   toJS str = MkJSString (believe_me str)
 
+implementation ToJS Nat JSNumber where
+  toJS num = MkJSNumber (believe_me num)
+
 implementation ToJS Int JSNumber where
   toJS num = MkJSNumber (believe_me num)
 
+implementation ToJS Integer JSNumber where
+  toJS num = MkJSNumber (believe_me num)
+
 implementation ToJS Double JSNumber where
   toJS num = MkJSNumber (believe_me num)
 
@@ -100,6 +106,9 @@ implementation FromJS JSString String where
 implementation FromJS JSNumber Int where
   fromJS (MkJSNumber num) = cast {from=Double} {to=Int} (believe_me num)
 
+implementation FromJS JSNumber Integer where
+  fromJS (MkJSNumber num) = cast {from=Double} {to=Integer} (believe_me num)
+
 implementation FromJS JSNumber Double where
   fromJS (MkJSNumber num) = believe_me num
 
diff --git a/IdrisScript/Objects.idr b/IdrisScript/Objects.idr
index 2de5be5..180c7b1 100644
--- a/IdrisScript/Objects.idr
+++ b/IdrisScript/Objects.idr
@@ -24,7 +24,7 @@ setProperty : (prop : String)
            -> (obj : JSValue (JSObject c))
            -> JS_IO (JSValue (JSObject c))
 setProperty prop val obj = do
-  jscall "%0[%1] = %2" (Ptr -> String -> Ptr -> JS_IO Ptr)
+  jscall "%0[%1] = %2" (Ptr -> String -> Ptr -> JS_IO ())
          (unpack obj) prop (unpack val)
   pure obj