diff --git a/Dockerfile b/Dockerfile
index ed8265d..41a2398 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,6 +36,6 @@ RUN mkdocs build
 
 # Extract the static content from the build
 # and use a nginx image to serve the content
-FROM nginx:alpine
+FROM nginx:alpine@sha256:082f8c10bd47b6acc8ef15ae61ae45dd8fde0e9f389a8b5cb23c37408642bf5d
 COPY --from=app-zip-creator /app.zip /usr/share/nginx/html/assets/app.zip
 COPY --from=build /app/site /usr/share/nginx/html