diff --git a/dockerfile b/dockerfile
index ed9ea00d..eb113034 100644
--- a/dockerfile
+++ b/dockerfile
@@ -127,6 +127,7 @@ RUN pip --disable-pip-version-check list --outdated --format=json | \
     python -c "import json, sys; print('\n'.join([x['name'] for x in json.load(sys.stdin)]))" | \
     xargs -n1 pip install --no-cache-dir -U; \
   apk update --no-cache; \
+  apk upgrade --no-cache; \
   apk add --no-cache \
     mariadb-client \
     mariadb-dev \