diff --git a/release.notes b/release.notes
index 3874ad4af..738ad35c4 100644
--- a/release.notes
+++ b/release.notes
@@ -1,5 +1,6 @@
-[v4r3-pre15]
+[v4r3-pre16]
 
+FIX: (#535) Use lists instead of tuples in VMDiracHandler
 NEW: (#514) use default menu for fresh WebApp installation
 FIX: (#515) align VMDIRAC with ext6
 NEW: (#501) add VMDIRAC application
diff --git a/src/WebAppDIRAC/__init__.py b/src/WebAppDIRAC/__init__.py
index 3c63b0aa4..925113980 100644
--- a/src/WebAppDIRAC/__init__.py
+++ b/src/WebAppDIRAC/__init__.py
@@ -25,7 +25,7 @@
   majorVersion = 4
   minorVersion = 3
   patchLevel = 0
-  preVersion = 15
+  preVersion = 16
 
   version = "v%sr%s" % (majorVersion, minorVersion)
   buildVersion = "v%dr%d" % (majorVersion, minorVersion)