diff --git a/data/demo/dragon-spine/README.txt b/data/demo/dragon-spine/README.txt
index 8b12df9..5c6da42 100644
--- a/data/demo/dragon-spine/README.txt
+++ b/data/demo/dragon-spine/README.txt
@@ -1,6 +1,6 @@
 Animated dragon in Spine JSON format.
 
-You can open it e.g. in Castle Game Engine ( https://castle-engine.io/ ) that supports Spine. You can quickly test it by opening in our model viewer: https://castle-engine.io/model-viewer .
+You can open it e.g. in Castle Game Engine ( https://castle-engine.io/ ) that supports Spine. You can quickly test it by opening in our model viewer: https://castle-engine.io/castle-model-viewer .
 
 By Paweł Wojciechowicz from https://cat-astrophe-games.com/ .
 Licensed on the GNU GPL >= 2 terms.