diff --git a/src/Unused/Aliases.hs b/src/Unused/Aliases.hs
index c616726..c043f85 100644
--- a/src/Unused/Aliases.hs
+++ b/src/Unused/Aliases.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.Aliases
     ( groupedTermsAndAliases
     , termsAndAliases
diff --git a/src/Unused/GitContext.hs b/src/Unused/GitContext.hs
index 010d843..9d7b13f 100644
--- a/src/Unused/GitContext.hs
+++ b/src/Unused/GitContext.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.GitContext
     ( gitContextForResults
     ) where
diff --git a/src/Unused/Projection.hs b/src/Unused/Projection.hs
index 910f0f5..107c236 100644
--- a/src/Unused/Projection.hs
+++ b/src/Unused/Projection.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.Projection where
 
 import qualified Data.Bifunctor as BF
diff --git a/src/Unused/ResultsClassifier/Types.hs b/src/Unused/ResultsClassifier/Types.hs
index 16866a0..e201511 100644
--- a/src/Unused/ResultsClassifier/Types.hs
+++ b/src/Unused/ResultsClassifier/Types.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleInstances #-}
 
 module Unused.ResultsClassifier.Types
@@ -14,8 +13,8 @@ import qualified Control.Applicative as A
 import qualified Control.Monad as M
 import qualified Data.HashMap.Strict as HM
 import qualified Data.List as L
-import qualified Data.Text as T
 import           Data.Text (Text)
+import qualified Data.Text as T
 import           Data.Yaml (FromJSON(..), (.:), (.:?), (.!=))
 import qualified Data.Yaml as Y
 import           Unused.Projection
diff --git a/src/Unused/TagsSource.hs b/src/Unused/TagsSource.hs
index b7a6d9b..2eb49d5 100644
--- a/src/Unused/TagsSource.hs
+++ b/src/Unused/TagsSource.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.TagsSource
     ( TagSearchOutcome(..)
     , loadTagsFromFile
diff --git a/src/Unused/TermSearch/Internal.hs b/src/Unused/TermSearch/Internal.hs
index 10607a8..f880bdd 100644
--- a/src/Unused/TermSearch/Internal.hs
+++ b/src/Unused/TermSearch/Internal.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.TermSearch.Internal
     ( commandLineOptions
     , parseSearchResult
diff --git a/test/Unused/AliasesSpec.hs b/test/Unused/AliasesSpec.hs
index 9006dfa..8d8c3ea 100644
--- a/test/Unused/AliasesSpec.hs
+++ b/test/Unused/AliasesSpec.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.AliasesSpec where
 
 import Data.Monoid ((<>))
diff --git a/test/Unused/ProjectionSpec.hs b/test/Unused/ProjectionSpec.hs
index f415994..454e549 100644
--- a/test/Unused/ProjectionSpec.hs
+++ b/test/Unused/ProjectionSpec.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-
 module Unused.ProjectionSpec where
 
 import Data.Text (Text)
diff --git a/unused.cabal b/unused.cabal
index 9afe114..14a1b90 100644
--- a/unused.cabal
+++ b/unused.cabal
@@ -84,6 +84,7 @@ library
                      , file-embed
   ghc-options:         -Wall
   default-language:    Haskell2010
+  default-extensions:  OverloadedStrings
 
 executable unused
   hs-source-dirs:      app
@@ -117,6 +118,7 @@ test-suite unused-test
                      , Unused.AliasesSpec
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N -Wall
   default-language:    Haskell2010
+  default-extensions:  OverloadedStrings
 
 source-repository head
   type:     git