diff --git a/docker/converter.Dockerfile b/docker/converter.Dockerfile
index 7bf22fe..56bdd07 100644
--- a/docker/converter.Dockerfile
+++ b/docker/converter.Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.6-alpine
+FROM python:3.9-alpine
 
 RUN apk add nginx openjdk8 python3-dev build-base linux-headers pcre-dev bash