diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 Version 1.20
 ------------
   * bugfixes for #if defined(FOO) && FOO(a,b)
+  * (1.20.1): fix version number
 
 Version 1.19
 ------------
diff --git a/cpphs.cabal b/cpphs.cabal
--- a/cpphs.cabal
+++ b/cpphs.cabal
@@ -1,5 +1,5 @@
 Name: cpphs
-Version: 1.20
+Version: 1.20.1
 Copyright: 2004-2016, Malcolm Wallace
 License: LGPL
 License-File: LICENCE-LGPL
diff --git a/cpphs.hs b/cpphs.hs
--- a/cpphs.hs
+++ b/cpphs.hs
@@ -20,7 +20,7 @@
 import Data.List   ( isPrefixOf )
 
 version :: String
-version = "1.19.3"
+version = "1.20.1"
 
 main :: IO ()
 main = do
diff --git a/docs/index.html b/docs/index.html
--- a/docs/index.html
+++ b/docs/index.html
@@ -203,6 +203,7 @@
 <a href="http://hackage.haskell.org/package/cpphs">Hackage</a>.
 <ul>
 <li> bugfix for #if defined(FOO) &amp;&amp; FOO(a,b)
+<li> (1.20.1) fix version number
 </ul>
 
 <p>