diff --git a/hashable.cabal b/hashable.cabal
index 10aa4cd..f888e61 100644
--- a/hashable.cabal
+++ b/hashable.cabal
@@ -64,6 +64,13 @@ flag random-initial-seed
   manual:      True
   default:     False
 
+flag os-string
+  description:
+    Use the new os-string package and filepath pacakage version >= 1.5.0.0
+
+  manual:      False
+  default:     False
+
 library
   exposed-modules:
     Data.Hashable
@@ -84,10 +91,17 @@ library
     , bytestring  >=0.10.8.2 && <0.13
     , containers  >=0.5.10.2 && <0.7
     , deepseq     >=1.4.3.0  && <1.6
-    , filepath    >=1.4.1.2  && <1.5
     , ghc-prim
     , text        >=1.2.3.0  && <1.3  || >=2.0 && <2.2
 
+  if flag(os-string)
+    build-depends:
+        filepath >=1.5.0.0 && <1.6
+      , os-string >=2.0.2 && <2.1
+  else
+    build-depends:
+        filepath    >=1.4.1.2  && <1.5
+
   if !impl(ghc >=9.2)
     build-depends: base-orphans >=0.8.6 && <0.10