diff --git a/xmonad-contrib.cabal b/xmonad-contrib.cabal
index f11146aa..8a0e34a0 100644
--- a/xmonad-contrib.cabal
+++ b/xmonad-contrib.cabal
@@ -64,7 +64,7 @@ library
                    random,
                    mtl >= 1 && < 3,
                    unix,
-                   X11>=1.6.1 && < 1.9,
+                   X11>=1.6.1 && < 1.10,
                    xmonad>=0.13   && < 0.14,
                    utf8-string,
                    semigroups