diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -1,6 +1,7 @@
 module Main (main) where
 
 import           Control.Monad
+import           Data.Semigroup
 import           Data.Version          (showVersion)
 import           Language.C.Dependency
 import           Options.Applicative
diff --git a/cdeps.cabal b/cdeps.cabal
--- a/cdeps.cabal
+++ b/cdeps.cabal
@@ -1,6 +1,6 @@
 cabal-version: 1.18
 name: cdeps
-version: 0.1.0.1
+version: 0.1.0.2
 license: BSD3
 license-file: LICENSE
 copyright: Copyright: (c) 2018 Vanessa McHale
@@ -34,6 +34,7 @@
     build-tools: alex -any
     hs-source-dirs: src
     default-language: Haskell2010
+    other-extensions: OverloadedStrings
     ghc-options: -Wall
     build-depends:
         base >=4.9 && <5,