diff --git a/scripts/install b/scripts/install
index 1c191f1..9edc574 100644
--- a/scripts/install
+++ b/scripts/install
@@ -24,8 +24,6 @@ ynh_script_progression --message="Setting up source files..." --weight=4
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$install_dir"
 
-chown -R $app:www-data "$install_dir"
-
 #=================================================
 # SYSTEM CONFIGURATION
 #=================================================
@@ -41,8 +39,8 @@ ynh_script_progression --message="Adding a configuration file..." --weight=1
 
 ynh_add_config --template="../conf/config.json" --destination="$install_dir/config.json"
 
-chmod 400 "$install_dir/config.json"
-chown $app:$app "$install_dir/config.json"
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/upgrade b/scripts/upgrade
index 26bc2c0..3583ab8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -43,6 +43,7 @@ then
 	ynh_setup_source --dest_dir="$install_dir" --keep="config.json"
 fi
 
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================
@@ -52,8 +53,8 @@ chown -R $app:www-data "$install_dir"
 
 #ynh_add_config --template="../conf/config.json" --destination="$install_dir/config.json"
 
-#chmod 400 "$install_dir/config.json"
-#chown $app:$app "$install_dir/config.json"
+#chmod -R o-rwx "$install_dir"
+#chown -R $app:www-data "$install_dir"
 
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS