diff --git a/config-value.cabal b/config-value.cabal
index e65cec9..1e15ca4 100644
--- a/config-value.cabal
+++ b/config-value.cabal
@@ -48,7 +48,7 @@ library
 
   build-tool-depends:
     alex:alex   >= 3.2,
-    happy:happy >= 1.19 && <2.1,
+    happy:happy >= 1.19 && <2.2,
 
   hs-source-dirs:      src
   default-language:    Haskell2010