diff --git a/components/about/UpdatesPage/index.tsx b/components/about/UpdatesPage/index.tsx
index 668b3cb3..96a4cca1 100644
--- a/components/about/UpdatesPage/index.tsx
+++ b/components/about/UpdatesPage/index.tsx
@@ -56,6 +56,48 @@ const UpdatesPage = () => {
   return (
     <div className="Updates PageContent">
       <h1>{common('about.segmented_control.updates')}</h1>
+      <ContentUpdate
+        version="2023-05L"
+        dateString="2023/05/31"
+        event="events.legfest"
+        newItems={{
+          character: ['3040464000', '3040465000'],
+          weapon: ['1040116900', '1040218400', '1040712500', '1030804400'],
+        }}
+        numNotes={1}
+      />
+      <ContentUpdate
+        version="2023-05F"
+        dateString="2023/05/20"
+        event="events.flash"
+        newItems={{
+          character: ['3040463000', '3040462000'],
+          weapon: ['1040421800', '1040024600'],
+        }}
+        numNotes={0}
+      />
+      <ContentUpdate
+        version="2023-05U"
+        dateString="2023/05/18"
+        event="events.content"
+        newItems={{
+          weapon: ['1040712400'],
+        }}
+        uncappedItems={{
+          character: ['3040073000'],
+        }}
+        numNotes={1}
+      />
+      <ContentUpdate
+        version="2023-04L"
+        dateString="2023/04/30"
+        event="events.legfest"
+        newItems={{
+          character: ['3040460000', '3040461000'],
+          weapon: ['1040815500', '1040815600', '1040421700', '1030208100'],
+        }}
+        numNotes={0}
+      />
       <ContentUpdate
         version="2023-04U"
         dateString="2023/04/01"
diff --git a/public/locales/en/updates.json b/public/locales/en/updates.json
index f9192a38..1f937b86 100644
--- a/public/locales/en/updates.json
+++ b/public/locales/en/updates.json
@@ -19,6 +19,14 @@
     "uncap": "Uncap"
   },
   "versions": {
+    "2023-05L": {
+      "features": ["A large update is in the works. Stay tuned!"]
+    },
+    "2023-05U": {
+      "features": [
+        "Added Ultimate Mastery skills for classes: Sage, Chaos Ruler, Elysian, Glorybringer, Runeslayer"
+      ]
+    },
     "2023-03U2": {
       "features": ["Added new weapon series, World Series"]
     },
diff --git a/public/locales/ja/updates.json b/public/locales/ja/updates.json
index fade6116..6f37fdbf 100644
--- a/public/locales/ja/updates.json
+++ b/public/locales/ja/updates.json
@@ -19,6 +19,14 @@
     "uncap": "上限解放"
   },
   "versions": {
+    "2023-05L": {
+      "features": ["特大アップデートが開発中。お楽しみにしてください！"]
+    },
+    "2023-05U": {
+      "features": [
+        "「セージ」「カオスルーダー」「エリュシオン」「ザ・グローリー」「魔法戦士」の極致の証スキルを追加"
+      ]
+    },
     "2023-03U2": {
       "features": ["武器シリーズ「ワールドシリーズ」を追加"]
     },