diff --git a/Data/Ring/Semi/Natural.hs b/Data/Ring/Semi/Natural.hs
--- a/Data/Ring/Semi/Natural.hs
+++ b/Data/Ring/Semi/Natural.hs
@@ -233,6 +233,7 @@
     n *. Lines l c = Lines (fromIntegral n * l) c
     _ *. Pos f l c = Pos f l c 
     n *. t = Monoid.replicate t n 
+
 instance RightModule Natural (SourcePosition f) where (.*) = flip (*.)
 instance Module Natural (SourcePosition f) 
 
diff --git a/monoids.cabal b/monoids.cabal
--- a/monoids.cabal
+++ b/monoids.cabal
@@ -1,5 +1,5 @@
 name:		    monoids
-version:	    0.1.20
+version:	    0.1.21
 license:	    BSD3
 license-file:   LICENSE
 author:		    Edward A. Kmett
@@ -15,7 +15,7 @@
 
 library
   build-depends: 
-    base >= 4 && < 4.1,
+    base >= 4 && < 4.2,
     containers >= 0.2 && < 0.3, 
     text >= 0.1 && < 0.2, 
     parsec >= 3.0 && < 3.1,