diff --git a/strict-checked-vars/strict-checked-vars.cabal b/strict-checked-vars/strict-checked-vars.cabal
index 2265d119e7..c09ba0ecfe 100644
--- a/strict-checked-vars/strict-checked-vars.cabal
+++ b/strict-checked-vars/strict-checked-vars.cabal
@@ -50,9 +50,9 @@ library
   default-language: Haskell2010
   build-depends:
     , base         >=4.9 && <5
-    , io-classes   >=1.2 && <1.4
-    , strict-mvar  >=1.2 && <1.4
-    , strict-stm   >=1.2 && <1.4
+    , io-classes   >=1.2 && <1.5
+    , strict-mvar  >=1.2 && <1.5
+    , strict-stm   >=1.2 && <1.5
 
   ghc-options:
     -Wall -Wcompat -Wincomplete-uni-patterns