diff --git a/README.md b/README.md
index c1ee79a..177fb20 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ Hackage: [elm-bridge](http://hackage.haskell.org/package/elm-bridge)
 
 Building the bridge from [Haskell](http://haskell.org) to [Elm](http://elm-lang.org) and back. Define types once, use on both sides and enjoy easy (de)serialisation. Cheers!
 
+Note that the [bartavelle/json-helpers](http://package.elm-lang.org/packages/bartavelle/json-helpers/latest/) package, with version >= 1.1.0, is expected by the generated Elm modules.
+
 ## Usage
 
 ```haskell
diff --git a/src/Elm/Module.hs b/src/Elm/Module.hs
index 783677d..4b27116 100644
--- a/src/Elm/Module.hs
+++ b/src/Elm/Module.hs
@@ -29,6 +29,7 @@ makeElmModule moduleName defs = unlines (
     , "import Json.Decode"
     , "import Json.Decode exposing ((:=))"
     , "import Json.Encode"
+    , "-- The following module comes from bartavelle/json-helpers"
     , "import Json.Helpers exposing (..)"
     , ""
     , ""
diff --git a/test/Elm/ModuleSpec.hs b/test/Elm/ModuleSpec.hs
index 6fbc58d..5cd7dee 100644
--- a/test/Elm/ModuleSpec.hs
+++ b/test/Elm/ModuleSpec.hs
@@ -30,6 +30,7 @@ moduleCode = unlines
     , "import Json.Decode"
     , "import Json.Decode exposing ((:=))"
     , "import Json.Encode"
+    , "-- The following module comes from bartavelle/json-helpers"
     , "import Json.Helpers exposing (..)"
     , ""
     , ""
@@ -66,6 +67,7 @@ moduleCode' = unlines
     , "import Json.Decode"
     , "import Json.Decode exposing ((:=))"
     , "import Json.Encode"
+    , "-- The following module comes from bartavelle/json-helpers"
     , "import Json.Helpers exposing (..)"
     , ""
     , ""