diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# Version 0.3.1
+
+* Added missing language pragma.
+
+
 # Version 0.3
 
 * The `segment`, `key`, `value` and `message` functions are now methods of the
diff --git a/df1.cabal b/df1.cabal
--- a/df1.cabal
+++ b/df1.cabal
@@ -1,5 +1,5 @@
 name: df1
-version: 0.3
+version: 0.3.1
 author: Renzo Carbonara
 maintainer: renλren.zone
 copyright: Renzo Carbonara 2016-2018
diff --git a/lib/Df1/Render.hs b/lib/Df1/Render.hs
--- a/lib/Df1/Render.hs
+++ b/lib/Df1/Render.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE MultiWayIf #-}
 {-# LANGUAGE OverloadedStrings #-}