diff --git a/configure.ac b/configure.ac
index 6b8e15b31e617f01c07d30fe40efc099c81d0664..97f11933991064eed65d851c848e27c26b9c6e14 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 dnl graph-tool package version number
 m4_define(graph_tool_version_major, 2)
-m4_define(graph_tool_version_minor, 13dev)
+m4_define(graph_tool_version_minor, 13)
 
 AC_INIT([graph-tool],
         [graph_tool_version_major().graph_tool_version_minor()],