diff --git a/docker.cabal b/docker.cabal
--- a/docker.cabal
+++ b/docker.cabal
@@ -1,5 +1,5 @@
 name:                docker
-version:             0.6.0.0
+version:             0.6.0.2
 synopsis:            An API client for docker written in Haskell
 description:         See API documentation below.
 homepage:            https://github.com/denibertovic/docker-hs
@@ -28,7 +28,7 @@
                      , aeson >= 0.9.0 && < 2.0.0
                      , blaze-builder >= 0.4.0 && < 0.5.0
                      , bytestring >= 0.10.0 && < 0.11.0
-                     , containers >= 0.5.0 && < 0.6.0
+                     , containers >= 0.5.0 && < 0.7.0
                      , data-default-class >= 0.0.1 && < 0.2.0
                      , http-client >= 0.4.0 && < 0.6.0
                      , http-types >= 0.9 && < 0.13
diff --git a/tests/tests.hs b/tests/tests.hs
--- a/tests/tests.hs
+++ b/tests/tests.hs
@@ -76,7 +76,7 @@
 
 testDeleteImage :: IO ()
 testDeleteImage = runDocker $ do
-  (Just img) <- findTestImage
+  img <- fmap fromJust findTestImage
   result <- deleteImage defaultImageDeleteOpts (imageId img)
   lift $ assert $ isRight result
   maybeTestImageAfter <- findTestImage