diff --git a/configure.ac b/configure.ac
index 02bd33bd..68c72b4c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,9 +16,9 @@ ISODATE=`date +%Y-%m-%d`
 AC_SUBST(ISODATE)
 
 SODIUM_LIBRARY_VERSION_MAJOR=4
-SODIUM_LIBRARY_VERSION_MINOR=3
+SODIUM_LIBRARY_VERSION_MINOR=4
 DLL_VERSION=4
-SODIUM_LIBRARY_VERSION=8:0:4
+SODIUM_LIBRARY_VERSION=9:0:5
 #                      | | |
 #               +------+ | +---+
 #               |        |     |