diff --git a/Dockerfile b/Dockerfile
index 0d0553f..4adba44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7-alpine
+FROM python:3.9-alpine
 WORKDIR /opt/CTFd
 RUN mkdir -p /opt/CTFd /var/log/CTFd /var/uploads