diff --git a/ascii-case/ascii-case.cabal b/ascii-case/ascii-case.cabal
index 96896cf..8a66abe 100644
--- a/ascii-case/ascii-case.cabal
+++ b/ascii-case/ascii-case.cabal
@@ -37,14 +37,14 @@ common base
 
     build-depends:
       , ascii-char ^>= 1.0
-      , base ^>= 4.16 || ^>= 4.17 || ^>= 4.18 || ^>= 4.19
+      , base ^>= 4.16 || ^>= 4.17 || ^>= 4.18 || ^>= 4.19 || ^>= 4.20 || ^>= 4.21
 
 library
     import: base
     hs-source-dirs: library
 
     build-depends:
-      , hashable ^>= 1.3.5 || ^>= 1.4
+      , hashable ^>= 1.3.5 || ^>= 1.4 || ^>= 1.5
 
     exposed-modules:
         ASCII.Case