diff --git a/Dockerfile b/Dockerfile
index 0ad70d2..eb79b49 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG P2POOL_BRANCH=v1.3
+ARG P2POOL_BRANCH=v1.3.1
 
 # Select Ubuntu 20.04LTS for the build image base
 FROM ubuntu:20.04 as build