diff --git a/viperserver b/viperserver
index 57271769e..81db20d73 160000
--- a/viperserver
+++ b/viperserver
@@ -1 +1 @@
-Subproject commit 57271769ecf2743f81835a39910e53bdb83cb28e
+Subproject commit 81db20d73b18eee3fad81b4b036b7a448f0da939