diff --git a/sdl2-ttf.cabal b/sdl2-ttf.cabal
--- a/sdl2-ttf.cabal
+++ b/sdl2-ttf.cabal
@@ -1,5 +1,5 @@
 name:          sdl2-ttf
-version:       2.0.0
+version:       2.0.1
 synopsis:      Bindings to SDL2_ttf.
 description:   Haskell bindings to SDL2_ttf C++ library <http://www.libsdl.org/projects/SDL_ttf/>.
 bug-reports:   https://github.com/haskell-game/sdl2-ttf/issues
@@ -44,7 +44,8 @@
     bytestring       >= 0.10.4.0,
     sdl2             >= 2.2,
     template-haskell,
-    text             >= 1.1.0.0
+    text             >= 1.1.0.0,
+    transformers     >= 0.4
 
   default-language:
     Haskell2010