bump version number
diff --git a/got-version.mk b/got-version.mk
index f2f1322..fbb957e 100644
--- a/got-version.mk
+++ b/got-version.mk
@@ -1,5 +1,5 @@
GOT_RELEASE=No
-GOT_VERSION_NUMBER=0.63
+GOT_VERSION_NUMBER=0.64
.if ${GOT_RELEASE} == Yes
GOT_VERSION=${GOT_VERSION_NUMBER}