diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2c77d22..08ecae3 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -19,6 +19,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY services/ /app/services/
 COPY scripts/ /app/scripts/
 COPY tests/ /app/tests/
+# cache-bust: 2026-05-01
 COPY conftest.py /app/conftest.py
 
 RUN useradd -m -u 1000 stonks && \