diff --git a/data/versions.json b/data/versions.json
index 2ac3f11..d01a113 100644
--- a/data/versions.json
+++ b/data/versions.json
@@ -472,5 +472,6 @@
   "517.0.0",
   "518.0.0",
   "519.0.0",
-  "520.0.0"
+  "520.0.0",
+  "521.0.0"
 ]