diff --git a/docker/Dockerfile b/docker/Dockerfile
index 73fdb26..7c8995e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.6
+FROM python:3.9
 LABEL maintainer "Nicola Bernini <nicola.bernini@gmail.com>"
 COPY requirements.txt .
 RUN apt-get update && apt-get -y install sudo