diff --git a/src/instana/version.py b/src/instana/version.py
index 4884162b..9c3e1cdd 100644
--- a/src/instana/version.py
+++ b/src/instana/version.py
@@ -3,4 +3,4 @@
 
 # Module version file.  Used by setup.py and snapshot reporting.
 
-VERSION = "3.9.0"
+VERSION = "3.9.1"