diff --git a/configure.ac b/configure.ac
index bacb2f9..0ba4a80 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,9 +22,9 @@
 
 # For libtool.
 dnl Please update these for releases.
-OPUS_LT_CURRENT=4
+OPUS_LT_CURRENT=5
 OPUS_LT_REVISION=0
-OPUS_LT_AGE=4
+OPUS_LT_AGE=5
 
 AC_SUBST(OPUS_LT_CURRENT)
 AC_SUBST(OPUS_LT_REVISION)