diff --git a/Dockerfile b/Dockerfile
index 87bacef..406a6da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,4 +9,5 @@ WORKDIR /app
 VOLUME [ "/rec" ]
 COPY --from=0 /output /app
 ENTRYPOINT [ "/app/BililiveRecorder.Cli" ]
+EXPOSE 2356/tcp
 CMD [ "run", "--bind", "http://*:2356", "/rec" ]
diff --git a/Dockerfile.GitHubActions b/Dockerfile.GitHubActions
index ee5e3b3..8449006 100644
--- a/Dockerfile.GitHubActions
+++ b/Dockerfile.GitHubActions
@@ -5,4 +5,5 @@ WORKDIR /app
 VOLUME [ "/rec" ]
 COPY ./BililiveRecorder.Cli/bin/docker_out /app
 ENTRYPOINT [ "dotnet", "/app/BililiveRecorder.Cli.dll" ]
+EXPOSE 2356/tcp
 CMD [ "run", "--bind", "http://*:2356", "/rec" ]