diff --git a/Dockerfile b/Dockerfile
index 2128379..38d5efe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.15 as builder
+FROM docker.io/alpine:3.16 as builder
 
 ENV VERSION=0.11.3
 
@@ -43,7 +43,7 @@ RUN python3 setup.py install --prefix=/install
 RUN pip3 install --prefix=/install mautrix-telegram[all]==$VERSION
 
 
-FROM thallian/confd-env:latest
+FROM docker.io/thallian/confd-env:3.16
 
 ENV FFMPEG_BINARY=/usr/bin/ffmpeg
 
@@ -81,7 +81,7 @@ RUN apk --no-cache add \
 	py3-mako \
 	py3-setuptools
 
-ENV PYTHONPATH=/usr/lib/python3.9/site-packages:/py-pkgs/lib/python3.9/site-packages/
+ENV PYTHONPATH=/usr/lib/python3.10/site-packages:/py-pkgs/lib/python3.10/site-packages/
 
 WORKDIR /var/lib/matrix-bridge