diff --git a/Dockerfile b/Dockerfile
index 7bfc3dac..8a29bde7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,5 +22,5 @@ COPY --from=build --chown=node:node /app/.git /app/.git
 
 USER node
 
-EXPOSE 9000
+EXPOSE ${API_PORT}
 CMD [ "node", "src/cobalt" ]