diff --git a/Dockerfile b/Dockerfile
index daef513..55ee59d 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,7 +31,7 @@ RUN \
 
 # install UV and create .venv
 RUN curl -LsSf https://astral.sh/uv/$(cat ./requirement-uv.txt | awk -F'==' '{print $2}' | tr -d ' \n')/install.sh | sh && \
-    source $HOME/.local/bin/env && \
+    . $HOME/.local/bin/env && \
     uv sync --frozen --no-install-project
 
 # install shared tools from tools.json;