diff --git a/scripts/install b/scripts/install
index 21c5c07..d2d49b8 100644
--- a/scripts/install
+++ b/scripts/install
@@ -58,7 +58,6 @@ ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 ynh_script_progression --message="Setting up source files..." --weight=4
 
 # Download, check integrity, uncompress and patch the source from app.src
-# For this app sources are in app subdirectory
 ynh_setup_source "$final_path"
 
 #=================================================
@@ -67,8 +66,8 @@ ynh_setup_source "$final_path"
 # SECURE FILES AND DIRECTORIES
 #=================================================
 
-# Set permissions to phpsysinfo directory
-chown -R www-data: "$final_path"
+# Restore permissions on app files
+chown -R www-data:www-data "$final_path"
 
 #=================================================
 # NGINX CONFIGURATION
diff --git a/scripts/restore b/scripts/restore
index c5e263e..6371596 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -56,7 +56,7 @@ ynh_restore_file --origin_path="$final_path"
 #=================================================
 
 # Restore permissions on app files
-chown -R www-data: $final_path
+chown -R www-data:www-data "$final_path"
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index c5d1646..afb6b80 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -100,7 +100,7 @@ ynh_add_nginx_config
 #=================================================
 
 # Set permissions on app files
-chown -R www-data: $final_path
+chown -R www-data:www-data "$final_path"
 
 #=================================================
 # RELOAD NGINX