diff --git a/web/src/main/resources/public/mc_versions.json b/web/src/main/resources/public/mc_versions.json
index 0f84bff..07c368c 100644
--- a/web/src/main/resources/public/mc_versions.json
+++ b/web/src/main/resources/public/mc_versions.json
@@ -1,4 +1,36 @@
 [
+  {
+    "id": "1.21-pre2",
+    "name": "1.21 Pre-Release 2",
+    "world_version": 3949,
+    "series_id": "main",
+    "protocol_version": 1073742024,
+    "pack_version": {
+      "resource": 34,
+      "data": 47
+    },
+    "build_time": "2024-05-31T12:42:21+00:00",
+    "java_component": "java-runtime-delta",
+    "java_version": 21,
+    "stable": false,
+    "use_editor": false
+  },
+  {
+    "id": "1.21-pre1",
+    "name": "1.21 Pre-Release 1",
+    "world_version": 3948,
+    "series_id": "main",
+    "protocol_version": 1073742023,
+    "pack_version": {
+      "resource": 34,
+      "data": 46
+    },
+    "build_time": "2024-05-29T12:02:00+00:00",
+    "java_component": "java-runtime-delta",
+    "java_version": 21,
+    "stable": false,
+    "use_editor": false
+  },
   {
     "id": "24w21b",
     "name": "24w21b",