diff --git a/json-spec-elm.cabal b/json-spec-elm.cabal
--- a/json-spec-elm.cabal
+++ b/json-spec-elm.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.0
 name:                json-spec-elm
-version:             0.4.0.3
+version:             0.4.0.4
 synopsis:            Elm code generate for `json-spec`.
 description:         
                      Produce elm types, encoders, and decoders from a
@@ -24,7 +24,7 @@
     , base                 >= 4.17.2.1 && < 4.21
     , containers           >= 0.6.7    && < 0.8
     , elm-syntax           >= 0.3.2.0  && < 0.4
-    , json-spec            >= 0.3.0.0  && < 0.6
+    , json-spec            >= 0.3.0.0  && < 1.1
     , text                 >= 2.0.2    && < 2.2
 
 common warnings