diff --git a/Dockerfile b/Dockerfile
index ef0aa9a..c4e0574 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM bitnami/minideb:buster as build
+FROM bitnami/minideb:bullseye as build
 
 ARG tini_version=0.19.0
 
@@ -20,7 +20,7 @@ RUN install_packages \
     && wget --quiet https://github.com/krallin/tini/releases/download/v${tini_version}/tini \
          --output-document=/sbin/tini
 
-FROM bitnami/minideb:buster
+FROM bitnami/minideb:bullseye
 
 RUN install_packages \
     gettext-base \
@@ -44,7 +44,7 @@ RUN install_packages \
     uwsgi \
     uwsgi-plugin-python3
 
-COPY --from=build /usr/local/lib/python3.7 /usr/local/lib/python3.7
+COPY --from=build /usr/local/lib/python3.9 /usr/local/lib/python3.9
 COPY --from=build /usr/local/bin /usr/local/bin
 COPY --from=build --chown=999:www-data /app /app
 COPY --from=build /sbin/tini /sbin/tini