diff --git a/Dockerfile b/Dockerfile
index 64919de2f64a9a6df230213c7cf23b876f0aaf94..7d7069062a89225ef1dde22bc60eb14b9e85383a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,10 +29,11 @@ COPY --from=builder /usr/local/lib/python3.8/site-packages/PyICU-2.8.1.dist-info
 
 # icu-dev package is nevertheless needed by the python library
 # hadolint ignore=DL3018
-RUN adduser -D repdav \
+RUN adduser -D repdav -u 1000 \
     && apk add --no-cache icu-dev
 
-USER repdav
+# use a "numeric" user for k8s compatibility
+USER 1000
 
 COPY --chown=repdav requirements.txt /
 RUN pip install \
diff --git a/requirements.txt b/requirements.txt
index 9209a4456638de8836b3d11f726e483e28444d3a..0f5e915747cdff750fb8fa5f915db985b8cc0518 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
-tgclients[icu]==0.8.0
+tgclients[icu]==0.9.0
 cheroot==9.0.0
-sentry-sdk==1.11.1
-WsgiDAV==4.1.0
+sentry-sdk==1.19.1
+WsgiDAV==4.2.0