diff --git a/dia-functions.cabal b/dia-functions.cabal
--- a/dia-functions.cabal
+++ b/dia-functions.cabal
@@ -1,5 +1,5 @@
 name:                dia-functions
-version:             0.2.1.4
+version:             0.2.1.5
 category:            Graphics, Education
 synopsis:            An EDSL for teaching Haskell with diagrams - functions
 description:
@@ -30,7 +30,7 @@
   Build-Depends:
     data-pprint >= 0.2 && < 0.3,
     dia-base >= 0.1 && < 0.2,
-    base >= 4.0 && < 4.9,
+    base >= 4.0 && < 4.10,
     containers >= 0.4 && < 0.6,
     xhtml >= 3000.2 && < 3000.3,
     mtl >= 2.0 && < 2.3,