diff --git a/Dockerfile b/Dockerfile
index 5d4f121..6e98a9a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM quay.io/thallian/confd-env:latest
 
-ENV VERSION v0.20.0
+ENV VERSION v0.21.1
 
 RUN addgroup -g 2222 synapse
 RUN adduser -h /var/lib/synapse -u 2222 -D -G synapse synapse