diff --git a/Containerfile b/Containerfile
index 8725a4d..79f9358 100644
--- a/Containerfile
+++ b/Containerfile
@@ -13,6 +13,6 @@ RUN \
   --mount=from=code.philo.ydns.eu/philorg/uv,source=/usr/lib/libpcre2-8.so.0,target=/usr/lib/libpcre2-8.so.0 \
   --mount=from=code.philo.ydns.eu/philorg/uv,source=/usr/bin/git,target=/usr/bin/git \
   --mount=type=cache,target=/root/.cache/uv \
-  uv pip install --system .
+  uv sync --frozen --no-cache && uv pip install --system .
 
 ENTRYPOINT ["foo"]