diff --git a/ghc-mod.cabal b/ghc-mod.cabal
index 65be657..5a9abd7 100644
--- a/ghc-mod.cabal
+++ b/ghc-mod.cabal
@@ -60,6 +60,7 @@ Library
   Build-Depends:        base >= 4.0 && < 5
                       , Cabal >= 1.10
                       , containers
+                      , convertible
                       , directory
                       , filepath
                       , ghc