diff --git a/lemur.cabal b/lemur.cabal
index cf7c8d3..21a0dc6 100644
--- a/lemur.cabal
+++ b/lemur.cabal
@@ -21,7 +21,7 @@ executable lemur
   main-is:             Main.hs
   other-modules:       Zipper
   -- other-extensions:
-  build-depends:       base >=4.11 && <4.12
+  build-depends:       base >=4.11 && <4.13
                      , mtl
   ghc-options:         -Wall
   hs-source-dirs:      src