diff --git a/scripts/install b/scripts/install
index 35b3a40..fcb5579 100755
--- a/scripts/install
+++ b/scripts/install
@@ -99,7 +99,7 @@ ynh_script_progression --message="Configuring TiddlyWiki..." --weight=2
 
 pushd $final_path
 	ynh_use_nodejs
-	npm install -g tiddlywiki
+	ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm install -g tiddlywiki
 	ynh_exec_as $app env $ynh_node_load_PATH tiddlywiki mynewwiki --init server
 popd
 
diff --git a/scripts/upgrade b/scripts/upgrade
index f9843a4..919035f 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -88,7 +88,7 @@ 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
+		ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm update -g tiddlywiki
 	popd
 fi