diff --git a/server/version.py b/server/version.py
index f58644f..143a3b2 100644
--- a/server/version.py
+++ b/server/version.py
@@ -1,5 +1,5 @@
 # Server name and protocol versions
 
 VERSION = 'ElectrumX 1.0.17'
-PROTOCOL_MIN = '0.10'
+PROTOCOL_MIN = '0.9'
 PROTOCOL_MAX = '1.1'