diff --git a/http-pony-transformer-http.cabal b/http-pony-transformer-http.cabal
--- a/http-pony-transformer-http.cabal
+++ b/http-pony-transformer-http.cabal
@@ -1,5 +1,5 @@
 name:                http-pony-transformer-http
-version:             0.1.0.1
+version:             0.1.0.2
 synopsis:            Transform raw TCP stream to a basic HTTP type
 license:             BSD3
 license-file:        LICENSE
@@ -19,7 +19,7 @@
   build-depends:       base >=4.8 && < 5
                      , bytestring >=0.10
                      , pipes >=4.1
-                     , transformers >=0.5
+                     , transformers >=0.4
                      , attoparsec >=0.13
                      , pipes-attoparsec >=0.5