diff --git a/create-packages.sh b/create-packages.sh
index 82a8da6bc2..5976630161 100755
--- a/create-packages.sh
+++ b/create-packages.sh
@@ -42,6 +42,7 @@ cd dist/production
 cd firefox
 # Normalize timestamp to get reproducible zip file
 find . -exec touch -t 200810310000 {} +
+chmod 644 -R *
 
 # Create zip file
 zip -rX ../alby-firefox-v$VERSION.xpi *
@@ -52,6 +53,7 @@ echo "Created alby-firefox-v$VERSION.xpi (SHA512: $SHA)"
 cd ../chrome
 # Normalize timestamp to get reproducible zip file
 find . -exec touch -t 200810310000 {} +
+chmod 644 -R *
 
 # Create zip file
 zip -rX ../alby-chrome-v$VERSION.zip *
@@ -62,6 +64,7 @@ echo "Created alby-chrome-v$VERSION.zip (SHA512: $SHA)"
 cd ../opera
 # Normalize timestamp to get reproducible zip file
 find . -exec touch -t 200810310000 {} +
+chmod 644 -R *
 
 # Create zip file
 zip -rX ../alby-opera-v$VERSION.crx *