Pre-release version bump
diff --git a/configure.ac b/configure.ac
index a2eaecb..2828648 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,7 +54,7 @@
 
 m4_define([pixman_major], 0)
 m4_define([pixman_minor], 17)
-m4_define([pixman_micro], 3)
+m4_define([pixman_micro], 4)
 
 m4_define([pixman_version],[pixman_major.pixman_minor.pixman_micro])