diff --git a/chapters/ch03/python-app/Dockerfile b/chapters/ch03/python-app/Dockerfile
index 5778318..83dbe82 100644
--- a/chapters/ch03/python-app/Dockerfile
+++ b/chapters/ch03/python-app/Dockerfile
@@ -1,5 +1,6 @@
 FROM registry.access.redhat.com/ubi8/python-39
-ENV PORT 8080
+ENV PORT=8080
+# ENV PORT 8080 
 EXPOSE 8080
 WORKDIR /usr/src/app