diff --git a/configure.ac b/configure.ac
index 35f038fa7f32177dbd699dd320e4a09dec022270..d271c7ab8aaf6b8430b1227f426b19cec3a1ad8f 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, 15)
+m4_define(graph_tool_version_minor, 16)
 
 AC_INIT([graph-tool],
         [graph_tool_version_major().graph_tool_version_minor()],