diff --git a/app/Dockerfile b/app/Dockerfile
index e9c71be..3557980 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.11
 
 LABEL maintainer="JJTC <oci@jjtc.eu>"
 
-ENV PPM_VERSION=2.0.3 \
+ENV PPM_VERSION=2.1.3 \
     PPM_HTTP_VERSION=2.0.3 \
     BOOKSTACK=BookStack \
     BOOKSTACK_VERSION=0.29.2 \