diff --git a/directory.cabal b/directory.cabal
index 5d8c6553..c990422e 100644
--- a/directory.cabal
+++ b/directory.cabal
@@ -70,7 +70,7 @@ Library
     if flag(os-string)
       build-depends: filepath >= 1.5.0.0, os-string >= 2.0.0
     else
-      build-depends: filepath >= 1.4.100.0 && < 1.4.200.0
+      build-depends: filepath >= 1.4.100.0 && < 1.5
 
     ghc-options: -Wall