diff --git a/goldplate.cabal b/goldplate.cabal
index 998172a..d58f3d2 100644
--- a/goldplate.cabal
+++ b/goldplate.cabal
@@ -54,7 +54,7 @@ Library
     async                >= 2.2      && < 2.3,
     base                 >= 4.11     && < 5,
     bytestring           >= 0.10     && < 0.13,
-    Diff                 >= 0.3      && < 0.5,
+    Diff                 >= 0.3      && < 0.6,
     directory            >= 1.3      && < 1.4,
     filepath             >= 1.4      && < 1.5,
     Glob                 >= 0.10     && < 0.11,