diff --git a/client/version.py b/client/version.py
index 6b70df4fb..925d378d3 100644
--- a/client/version.py
+++ b/client/version.py
@@ -1,2 +1,2 @@
-ELECTRUM_VERSION = "0.40a"
+ELECTRUM_VERSION = "0.40b"
 SEED_VERSION = 4  # bump this everytime the seed generation is modified