diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000000..b347b11eac
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.2.3
diff --git a/site/_data/versions.yml b/site/_data/versions.yml
new file mode 100644
index 0000000000..9ce9c36da8
--- /dev/null
+++ b/site/_data/versions.yml
@@ -0,0 +1,4 @@
+vega: 5.27.0
+vega-lite: 5.16.3
+vega-embed: 6.24.0
+vega-tooltip: 0.34.0