diff --git a/bin/joj3-forge-convert b/bin/joj3-forge-convert
index 8ec2943..6034be0 100755
--- a/bin/joj3-forge-convert
+++ b/bin/joj3-forge-convert
@@ -5,6 +5,10 @@ set -x
 
 export PATH="/usr/bin:/bin:/usr/local/bin"
 unset IFS
+unset PYTHONPATH
+unset PYTHONHOME
+unset HTTP_PROXY
+unset HTTPS_PROXY
 
 main() {
     local org_name