diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,8 @@
+1.0.0.1 (28 November 2013)
+--------------------------
+
+    - Allow semigroups-0.12
+
 1.0 (25 November 2013)
 ----------------------
 
diff --git a/diagrams-lib.cabal b/diagrams-lib.cabal
--- a/diagrams-lib.cabal
+++ b/diagrams-lib.cabal
@@ -1,5 +1,5 @@
 Name:                diagrams-lib
-Version:             1.0
+Version:             1.0.0.1
 Synopsis:            Embedded domain-specific language for declarative graphics
 Description:         Diagrams is a flexible, extensible EDSL for creating
                      graphics of many types.  Graphics can be created
@@ -85,7 +85,7 @@
   Build-depends:       base >= 4.2 && < 4.8,
                        containers >= 0.3 && < 0.6,
                        array >= 0.3 && < 0.5,
-                       semigroups >= 0.3.4 && < 0.12,
+                       semigroups >= 0.3.4 && < 0.13,
                        monoid-extras >= 0.3 && < 0.4,
                        diagrams-core >= 1.0 && < 1.1,
                        active >= 0.1 && < 0.2,