diff --git a/backend/service-message/Dockerfile b/backend/service-message/Dockerfile
index 78cf074..ff0de4c 100644
--- a/backend/service-message/Dockerfile
+++ b/backend/service-message/Dockerfile
@@ -3,4 +3,5 @@ WORKDIR /app-message
 COPY ["package.json", "package-lock.json*", "./"]
 RUN npm install --NODE_ENV
 COPY . .
+EXPOSE 3000
 CMD [ "node", "server.js" ]
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