diff --git a/Language/GLSL/Pretty.hs b/Language/GLSL/Pretty.hs
--- a/Language/GLSL/Pretty.hs
+++ b/Language/GLSL/Pretty.hs
@@ -5,6 +5,7 @@
 import Text.Printf
 
 import Language.GLSL.Syntax
+import Prelude hiding ((<>))
 
 ----------------------------------------------------------------------
 -- helpers (TODO clean)
diff --git a/language-glsl.cabal b/language-glsl.cabal
--- a/language-glsl.cabal
+++ b/language-glsl.cabal
@@ -1,5 +1,5 @@
 name:                language-glsl
-version:             0.2.1
+version:             0.3.0
 Cabal-Version:       >= 1.8
 synopsis:            GLSL abstract syntax tree, parser, and pretty-printer
 description: