diff --git a/list-t.cabal b/list-t.cabal
--- a/list-t.cabal
+++ b/list-t.cabal
@@ -1,5 +1,5 @@
 name: list-t
-version: 1.0.5
+version: 1.0.5.1
 synopsis: ListT done right
 description:
   A correct implementation of the list monad-transformer.
@@ -34,7 +34,7 @@
     mmorph ==1.*,
     monad-control >=0.3 && <2,
     mtl ==2.*,
-    semigroups >=0.11 && <0.20,
+    semigroups >=0.11 && <0.21,
     transformers >=0.3 && <0.6,
     transformers-base ==0.4.*