diff --git a/src/app/app.ts b/src/app/app.ts
index 1e0fa518..b0b086db 100644
--- a/src/app/app.ts
+++ b/src/app/app.ts
@@ -236,6 +236,7 @@ Promise.all([
 
       treeVersionLabel.textContent = id
       version = id
+      ga('set', 'dimension3', version);
       updateModel()
     })
   }
diff --git a/src/index.html b/src/index.html
index 3b24a3ef..ff085a4a 100644
--- a/src/index.html
+++ b/src/index.html
@@ -11,6 +11,7 @@
     ga('set', 'page', location.pathname.replace(/^\/dev/, ''))
     ga('set', 'dimension1', localStorage.getItem('theme') ?? 'default');
     ga('set', 'dimension2', 'v2');
+    ga('set', 'dimension3', localStorage.getItem('schema_version') ?? '1.17');
     ga('send', 'pageview');
   </script>
   <!-- End Google Analytics -->