diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+* v0.4.0.1
+
+- allow semigroupoids-5.0
+
 * 0.4: 19 April 2015
 
   - add derived instances where possible:
diff --git a/monoid-extras.cabal b/monoid-extras.cabal
--- a/monoid-extras.cabal
+++ b/monoid-extras.cabal
@@ -1,5 +1,5 @@
 name:                monoid-extras
-version:             0.4.0.0
+version:             0.4.0.1
 synopsis:            Various extra monoid-related definitions and utilities
 description:         Various extra monoid-related definitions and utilities,
                      such as monoid actions, monoid coproducts, \"deletable\"
@@ -35,7 +35,7 @@
   build-depends:     base >= 4.3 && < 4.9,
                      groups < 0.5,
                      semigroups >= 0.8 && < 0.17,
-                     semigroupoids >= 4.0 && < 5
+                     semigroupoids >= 4.0 && < 5.1
 
   hs-source-dirs:    src