diff --git a/constraints.cabal b/constraints.cabal
--- a/constraints.cabal
+++ b/constraints.cabal
@@ -1,6 +1,6 @@
 name:          constraints
 category:      Constraints
-version:       0.4.1.2
+version:       0.4.1.3
 license:       BSD3
 cabal-version: >= 1.10
 license-file:  LICENSE
@@ -39,7 +39,7 @@
     GADTs
 
   build-depends:
-    base >= 4.4 && < 5,
+    base >= 4.5 && < 5,
     newtype >= 0.2 && < 0.3,
     ghc-prim
   exposed-modules: