diff --git a/Dockerfile b/Dockerfile
index a26f53b..e3c151a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.10-alpine3.14
+FROM python:3.9.10-alpine3.15
 
 ENV PYTHONUNBUFFERED=1
 ENV CRYPTOGRAPHY_DONT_BUILD_RUST=1