diff --git a/docker/debian-tester/Dockerfile b/docker/debian-tester/Dockerfile
index 02070e1..28ea1d3 100644
--- a/docker/debian-tester/Dockerfile
+++ b/docker/debian-tester/Dockerfile
@@ -65,4 +65,5 @@ CMD ["agent"]
 
 ARG TEST_FLAVOR=default
 COPY ./build/pyinstaller-${TEST_FLAVOR}-runner/runner /opt/runner
+RUN chmod +x /opt/runner/runner
 ENV PATH="/opt/runner:${PATH}"