diff --git a/tools/docker/core/Dockerfile b/tools/docker/core/Dockerfile
index 6942ca489..2b0ca2b0c 100644
--- a/tools/docker/core/Dockerfile
+++ b/tools/docker/core/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:2-alpine3.10
+FROM python:3.7-alpine3.10
 
 ARG CERTBOT_VERSION
 ENV CERTBOT_VERSION=${CERTBOT_VERSION}