diff --git a/unsequential.cabal b/unsequential.cabal
--- a/unsequential.cabal
+++ b/unsequential.cabal
@@ -1,7 +1,7 @@
 name:
   unsequential
 version:
-  0.5.0.2
+  0.5.1
 synopsis:
   An extension removing the sequentiality from monads
 description:
@@ -50,7 +50,8 @@
     dlist >= 0.7 && < 0.8,
     -- 
     transformers >= 0.4 && < 0.6,
-    base-prelude < 2
+    base-prelude < 2,
+    base < 5
 
 
 test-suite attoparsec-integration-test
@@ -79,4 +80,4 @@
     quickcheck-instances >= 0.3.11 && < 0.4,
     QuickCheck >= 2.8.1 && < 2.9,
     --
-    rebase >= 0.4 && < 0.5
+    rebase >= 0.4 && < 2