diff --git a/Dockerfile b/Dockerfile
index 98c5992..28911a2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,8 +15,10 @@ COPY apps/scanner/pyproject.toml ./scanner/pyproject.toml
 RUN pip install --no-cache-dir --prefix=/install api/.
 
 # Install Scanner dependencies (Playwright + Chromium)
+# PYTHONPATH needed because --prefix=/install doesn't auto-set site-packages path
 RUN pip install --no-cache-dir --prefix=/install scanner/. \
-    && playwright install chromium --with-deps
+    && PYTHONPATH=/install/lib/python3.12/site-packages \
+       /install/bin/playwright install chromium --with-deps
 
 # ── Runtime stage ────────────────────────────────────────────────────
 FROM python:3.12-slim