diff --git a/VERSION b/VERSION
index 167c7a18470b291260c6cdd97c381f38be6e7b8d..b1eec09dfbc7f1e7b5d1591078ba94e10080ddff 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.1.90
+5.1.91