diff --git a/src/textual/demo.py b/src/textual/demo.py
index adc24dcb3..b36d9a9ef 100644
--- a/src/textual/demo.py
+++ b/src/textual/demo.py
@@ -159,7 +159,7 @@ Here are some links. You can click these!
 [@click="app.open_link('https://github.com/Textualize/rich')"]Rich GitHub Repository[/]
 
 
-Built with ♥  by [@click="app.open_link(https://www.textualize.io)"]Textualize.io[/]
+Built with ♥  by [@click="app.open_link('https://www.textualize.io')"]Textualize.io[/]
 
 """