diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,8 @@
+1.2.0.4 (04 Dec 2014)
+---------------------
+
+- Allow `semigroups-0.16`
+
 1.2.0.3 (17 November 2014)
 --------------------------
 
diff --git a/diagrams-core.cabal b/diagrams-core.cabal
--- a/diagrams-core.cabal
+++ b/diagrams-core.cabal
@@ -1,5 +1,5 @@
 Name:                diagrams-core
-Version:             1.2.0.3
+Version:             1.2.0.4
 Synopsis:            Core libraries for diagrams EDSL
 Description:         The core modules underlying diagrams,
                      an embedded domain-specific language
@@ -37,7 +37,7 @@
 
   Build-depends:       base >= 4.2 && < 4.8,
                        containers >= 0.4.2 && < 0.6,
-                       semigroups >= 0.8.4 && < 0.16,
+                       semigroups >= 0.8.4 && < 0.17,
                        vector-space >= 0.8.4 && < 0.9,
                        vector-space-points >= 0.1 && < 0.3,
                        MemoTrie >= 0.4.7 && < 0.7,