diff --git a/preprocessor-tools.cabal b/preprocessor-tools.cabal
--- a/preprocessor-tools.cabal
+++ b/preprocessor-tools.cabal
@@ -1,5 +1,5 @@
 Name:           preprocessor-tools
-Version:        2.0.0
+Version:        2.0.1
 Cabal-Version:  >= 1.2.3
 License:        BSD3
 License-File:   LICENSE
@@ -28,7 +28,7 @@
 Library
   Build-Depends:        mtl >=1 && <3,
                         parsec >=3 && <4,
-                        base >=4 && <5,
+                        base >=4.11 && <5,
                         syb >=0 && <1
 
   Exposed-modules: