diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -86,15 +86,15 @@
 export GIT_BRANCH=master
 export DOCKER_TAG=fancyapp:latest
 
-docker-build-cacher Build # This will build the docker file
-docker-build-cacher Cache # This will cache each of the stage results separately
+docker-build-cacher build # This will build the docker file
+docker-build-cacher cache # This will cache each of the stage results separately
 ```
 
 Additionally, `docker-build-cacher` accepts the `DOCKERFILE` env variable in case the file is not present in the
 current directory:
 
 ```bash
-DOCKERFILE=buildfiles/Dockerfile docker-build-cacher Build
+DOCKERFILE=buildfiles/Dockerfile docker-build-cacher build
 ```
 
 At the end of the process you can call `docker images` and see that it has created `fancyapp:latest`, and if you are using
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -23,6 +23,8 @@
 import Filesystem.Path (FilePath)
 import Language.Dockerfile hiding (Tag)
 import Prelude hiding (FilePath)
+import Text.Read
+import Text.ParserCombinators.ReadP hiding (choice)
 import Turtle
 
 {- Glossary:
@@ -73,11 +75,23 @@
 data Mode
   = Build
   | Cache
-  deriving (Read, Show)
+  deriving (Show)
 
+instance Read Mode where
+  readPrec =
+    Text.Read.choice $
+    strValMap
+      [ ("Build", Build) -- Accept both casings
+      , ("build", Build)
+      , ("Cache", Cache)
+      , ("cache", Cache)
+      ]
+    where
+      strValMap = map (\(x, y) -> lift $ string x >> return y)
+
 -- | Describes the arguments this script takes from the command line
 parser :: Parser Mode
-parser = argRead "mode" "Whether to build or to cache (options: Build | Cache)"
+parser = argRead "mode" "Whether to build or to cache (options: build | cache)"
 
 main = do
   mode <- options "Builds a docker file and caches its stages" parser -- Parse the CLI arguments as a Mode
diff --git a/docker-build-cacher.cabal b/docker-build-cacher.cabal
--- a/docker-build-cacher.cabal
+++ b/docker-build-cacher.cabal
@@ -1,5 +1,5 @@
 name:                docker-build-cacher
-version:             1.0
+version:             1.1
 synopsis:            Builds a services with docker and caches all of its intermediate stages
 description:         A CLI tool to speed up multi-stage docker file builds by caching intermediate
                      stages separately, so the can be used in successive builds.
@@ -17,7 +17,7 @@
   hs-source-dirs:      app
   main-is:             Main.hs
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
-  build-depends:       base >= 2 && < 4
+  build-depends:       base >= 4.9.1.0 && < 5
                      , turtle
                      , language-dockerfile
                      , containers