diff --git a/bifunctors.cabal b/bifunctors.cabal
--- a/bifunctors.cabal
+++ b/bifunctors.cabal
@@ -1,6 +1,6 @@
 name:          bifunctors
 category:      Data, Functors
-version:       3.2.0.1
+version:       4.0
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -24,7 +24,7 @@
   build-depends:
     base          == 4.*,
     semigroups    >= 0.8.3.1,
-    semigroupoids == 3.*,
+    semigroupoids == 4.*,
     tagged        >= 0.4.4 && < 1
 
   exposed-modules: