diff --git a/Dockerfile b/Dockerfile
index 175f813..ccee3f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,4 +7,4 @@ RUN make all
 
 WORKDIR /app/dist
 CMD ["./posti-dm"]
-EXPOSE 3000
\ No newline at end of file
+EXPOSE 4000