diff --git a/scripts/_common.sh b/scripts/_common.sh
index 7912aa4..655d213 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,7 +4,9 @@
 # COMMON VARIABLES
 #=================================================
 
-nodejs_version=14
+nodejs_version="14"
+
+tiddlywiki_version="5.2.1"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/upgrade b/scripts/upgrade
index 20d0978..707c099 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -94,8 +94,7 @@ then
 	
 	pushd $final_path
 		ynh_use_nodejs
-		#npm update -g tiddlywiki
-		ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm update -g tiddlywiki@5.2.1
+		ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm update -g tiddlywiki@${tiddlywiki_version}
 	popd
 fi