diff --git a/scripts/install b/scripts/install
index 1e249c3..dec871b 100755
--- a/scripts/install
+++ b/scripts/install
@@ -249,9 +249,9 @@ fi
 
 # Set permissions to app files
 chown -R root:$app $final_path
-chmod -R g+r,g-w,o-rwx $final_path
+chmod -R g=u,g-w,o-rwx $final_path
 chown -R $app:$app $data_path
-chmod -R g-w,o-rwx $data_path
+chmod -R g=u,g-w,o-rwx $data_path
 chown -R $app:$app $final_path/data_models
 chown -R $app:$app /var/log/$app
 chmod -R g-w,o-rwx /var/log/$app
diff --git a/scripts/restore b/scripts/restore
index 5372f67..4ae668e 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -114,9 +114,9 @@ ynh_install_app_dependencies $pkg_dependencies
 
 # Restore permissions on app files
 chown -R root:$app $final_path
-chmod -R g+r,g-w,o-rwx $final_path
+chmod -R g=u,g-w,o-rwx $final_path
 chown -R $app:$app $data_path
-chmod -R g-w,o-rwx $data_path
+chmod -R g=u,g-w,o-rwx $data_path
 chown -R $app:$app $final_path/data_models
 chown -R $app:$app /var/log/$app
 chmod -R g-w,o-rwx /var/log/$app
diff --git a/scripts/upgrade b/scripts/upgrade
index 8eaff83..3e64238 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -220,9 +220,9 @@ fi
 
 # Set permissions to app files
 chown -R root:$app $final_path
-chmod -R g+r,g-w,o-rwx $final_path
+chmod -R g=u,g-w,o-rwx $final_path
 chown -R $app:$app $data_path
-chmod -R g-w,o-rwx $data_path
+chmod -R g=u,g-w,o-rwx $data_path
 chown -R $app:$app $final_path/data_models
 chown -R $app:$app /var/log/$app
 chmod -R g-w,o-rwx /var/log/$app