diff --git a/ui/package-lock.json b/ui/package-lock.json
index 31562fa821..02a9d787d8 100644
--- a/ui/package-lock.json
+++ b/ui/package-lock.json
@@ -14,7 +14,7 @@
         "@primer/octicons-react": "^19.38.0",
         "@primer/react": "^36.27.0",
         "react": "^18.3.1",
-        "react-dom": "^18.3.1",
+        "react-dom": "^19.3.0",
         "react-markdown": "^10.1.0",
         "remark-gfm": "^4.0.1",
         "zod": "^4.2.0"
@@ -22,7 +22,7 @@
       "devDependencies": {
         "@types/node": "^26.6.4",
         "@types/react": "^18.3.31",
-        "@types/react-dom": "^18.3.7",
+        "@types/react-dom": "^19.3.0",
         "@vitejs/plugin-react": "^6.1.1",
         "typescript": "^7.0.2",
         "vite": "^8.3.2",
@@ -1833,13 +1833,13 @@
       }
     },
     "node_modules/@types/react-dom": {
-      "version": "18.3.7",
-      "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-18.3.7.tgz",
-      "integrity": "sha512-MEe3UeoENYVFXzoXEWsvcpg6ZvlrFNlOQ7EOsvhI3CfAXwzPfO8Qwuxd40nepsYKqyyVQnTdEfv68q91yLcKrQ==",
+      "version": "19.3.0",
+      "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-19.3.0.tgz",
+      "integrity": "sha512-ZI7bU42mZXXKHn/qNLEw2IrbiINU7X5+vfgdixBHkCNpYWXjKgfQ/P+uyGb5CjOLB9UcnTeg3rylQtV2hym44Q==",
       "devOptional": true,
       "license": "MIT",
       "peerDependencies": {
-        "@types/react": "^18.0.0"
+        "@types/react": "^19.3.0"
       }
     },
     "node_modules/@types/react-is": {
@@ -4393,16 +4393,15 @@
       }
     },
     "node_modules/react-dom": {
-      "version": "18.3.1",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.3.1.tgz",
-      "integrity": "sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==",
+      "version": "19.3.0",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.3.0.tgz",
+      "integrity": "sha512-JDk8dgif51OjFoDE70+OT9ICyYr+69HlmihNwp1+Nsfbna3t5sIiCa9ZJktDmQ4/1b/rn26hIAR2uYXDMr5r0Q==",
       "license": "MIT",
       "dependencies": {
-        "loose-envify": "^1.1.0",
-        "scheduler": "^0.23.2"
+        "scheduler": "^0.28.0"
       },
       "peerDependencies": {
-        "react": "^18.3.1"
+        "react": "^19.3.0"
       }
     },
     "node_modules/react-intersection-observer": {
@@ -4567,13 +4566,10 @@
       }
     },
     "node_modules/scheduler": {
-      "version": "0.23.2",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.23.2.tgz",
-      "integrity": "sha512-UOShsPwz7NrMUqhR6t0hWjFduvOzbtv7toDH1/hIrfRNIDBnnBWd0CwJTGvTpngVlmwGCdP9/Zl/tVrDqcuYzQ==",
-      "license": "MIT",
-      "dependencies": {
-        "loose-envify": "^1.1.0"
-      }
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.28.0.tgz",
+      "integrity": "sha512-juorfCmIkIw8tT+p5BXSm6PJjQF/ycEYmKyzURCIt/RaZIhL+PulbQ9Yu2z1HdOJDdqDTlxA1+xKBmHXJsczAw==",
+      "license": "MIT"
     },
     "node_modules/semver": {
       "version": "6.3.1",
diff --git a/ui/package.json b/ui/package.json
index efbd84bb16..0a547ec22c 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -20,7 +20,7 @@
     "@primer/octicons-react": "^19.38.0",
     "@primer/react": "^36.27.0",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react-dom": "^19.3.0",
     "react-markdown": "^10.1.0",
     "remark-gfm": "^4.0.1",
     "zod": "^4.2.0"
@@ -28,7 +28,7 @@
   "devDependencies": {
     "@types/node": "^26.6.4",
     "@types/react": "^18.3.31",
-    "@types/react-dom": "^18.3.7",
+    "@types/react-dom": "^19.3.0",
     "@vitejs/plugin-react": "^6.1.1",
     "typescript": "^7.0.2",
     "vite": "^8.3.2",