diff --git a/Dockerfile b/Dockerfile
index 17fd4f6c..162a6622 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG HUMHUB_VERSION=1.3.17
+ARG HUMHUB_VERSION=1.3.20
 
 FROM composer:1.9.3 as builder-composer
 
diff --git a/README.md b/README.md
index dcce55fc..0451a3c8 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This container provides a quick, flexible and lightweight way to set-up a proof-
 ## Versions
 
 * [![dockerimage badge (latest)](https://images.microbadger.com/badges/version/mriedmann/humhub:latest.svg)](https://microbadger.com/images/mriedmann/humhub:latest "Get your own version badge on microbadger.com") `latest`:  unstable master build (use with caution! might be unstable)
-* [![dockerimage badge (1.3.x)](https://images.microbadger.com/badges/version/mriedmann/humhub:1.3.17.svg)](https://microbadger.com/images/mriedmann/humhub:1.3.17 "Get your own version badge on microbadger.com") `1.3.17`: latest stable release (recommended)
+* [![dockerimage badge (1.3.x)](https://images.microbadger.com/badges/version/mriedmann/humhub:1.3.20.svg)](https://microbadger.com/images/mriedmann/humhub:1.3.20 "Get your own version badge on microbadger.com") `1.3.20`: latest stable release (recommended)
 * [![dockerimage badge (experimental)](https://images.microbadger.com/badges/version/mriedmann/humhub:experimental.svg)](https://microbadger.com/images/mriedmann/humhub:experimental "Get your own version badge on microbadger.com") `experimental`: test build (testing only)
 
 ## Quickstart