diff --git a/demo/package-lock.json b/demo/package-lock.json
index 3e99db71f4..949fe9c0be 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -10,7 +10,7 @@
       "dependencies": {
         "@primer/css": "^21.5.1",
         "@primer/primitives": "^10.3.4",
-        "@rails/actioncable": "^7.2.100",
+        "@rails/actioncable": "^8.0.100",
         "@rails/ujs": "^7.1.501",
         "turbolinks": "^5.2.0"
       },
@@ -439,9 +439,10 @@
       "integrity": "sha512-f4tudg+MFpU4sH73Ha9wFOBwyN2b2WI7BkqMThqRIWQ/LFUturYkgt78YByJ6PJw8ZY0poPiefvBCdduyd20vA=="
     },
     "node_modules/@rails/actioncable": {
-      "version": "7.2.100",
-      "resolved": "https://registry.npmjs.org/@rails/actioncable/-/actioncable-7.2.100.tgz",
-      "integrity": "sha512-7xtIENf0Yw59AFDM3+xqxPCZxev3QVAqjPmUzmgsB9eL8S/zTpB0IU9srNc7XknzJI4e09XKNnCaJRx3gfYzXA=="
+      "version": "8.0.100",
+      "resolved": "https://registry.npmjs.org/@rails/actioncable/-/actioncable-8.0.100.tgz",
+      "integrity": "sha512-/vXTG6gzSW0CDqmA0hWasZ1UAGZC7g5NGM21jowh58rCCeTHAGbWwKExHn49VDuYXz+cHbL4MGfc5LMdTp9m3A==",
+      "license": "MIT"
     },
     "node_modules/@rails/ujs": {
       "version": "7.1.501",
@@ -1310,9 +1311,9 @@
       "integrity": "sha512-f4tudg+MFpU4sH73Ha9wFOBwyN2b2WI7BkqMThqRIWQ/LFUturYkgt78YByJ6PJw8ZY0poPiefvBCdduyd20vA=="
     },
     "@rails/actioncable": {
-      "version": "7.2.100",
-      "resolved": "https://registry.npmjs.org/@rails/actioncable/-/actioncable-7.2.100.tgz",
-      "integrity": "sha512-7xtIENf0Yw59AFDM3+xqxPCZxev3QVAqjPmUzmgsB9eL8S/zTpB0IU9srNc7XknzJI4e09XKNnCaJRx3gfYzXA=="
+      "version": "8.0.100",
+      "resolved": "https://registry.npmjs.org/@rails/actioncable/-/actioncable-8.0.100.tgz",
+      "integrity": "sha512-/vXTG6gzSW0CDqmA0hWasZ1UAGZC7g5NGM21jowh58rCCeTHAGbWwKExHn49VDuYXz+cHbL4MGfc5LMdTp9m3A=="
     },
     "@rails/ujs": {
       "version": "7.1.501",
diff --git a/demo/package.json b/demo/package.json
index 06383e9c49..ccdbd72a0e 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "@primer/css": "^21.5.1",
     "@primer/primitives": "^10.3.4",
-    "@rails/actioncable": "^7.2.100",
+    "@rails/actioncable": "^8.0.100",
     "@rails/ujs": "^7.1.501",
     "turbolinks": "^5.2.0"
   },