diff --git a/app/package.json b/app/package.json
index a5229227fb..d191a6f34a 100644
--- a/app/package.json
+++ b/app/package.json
@@ -92,6 +92,7 @@
     "@jupyterlab/terminal": "~4.2.0-beta.1",
     "@jupyterlab/terminal-extension": "~4.2.0-beta.1",
     "@jupyterlab/theme-dark-extension": "~4.2.0-beta.1",
+    "@jupyterlab/theme-dark-high-contrast-extension": "~4.2.0-beta.1",
     "@jupyterlab/theme-light-extension": "~4.2.0-beta.1",
     "@jupyterlab/toc-extension": "~6.2.0-beta.1",
     "@jupyterlab/tooltip": "~4.2.0-beta.1",
@@ -171,6 +172,7 @@
     "@jupyterlab/shortcuts-extension": "~5.0.0-beta.1",
     "@jupyterlab/terminal-extension": "~4.2.0-beta.1",
     "@jupyterlab/theme-dark-extension": "~4.2.0-beta.1",
+    "@jupyterlab/theme-dark-high-contrast-extension": "~4.2.0-beta.1",
     "@jupyterlab/theme-light-extension": "~4.2.0-beta.1",
     "@jupyterlab/toc-extension": "~6.2.0-beta.1",
     "@jupyterlab/tooltip-extension": "~4.2.0-beta.1",
@@ -295,6 +297,7 @@
         "@jupyterlab/terminal-extension": true,
         "@jupyterlab/theme-light-extension": true,
         "@jupyterlab/theme-dark-extension": true,
+        "@jupyterlab/theme-dark-high-contrast-extension": true,
         "@jupyterlab/translation-extension": true,
         "@jupyterlab/ui-components-extension": true,
         "@jupyterlab/hub-extension": true
diff --git a/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-chromium-linux.png b/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-chromium-linux.png
index 82be6f3210..64b70754ff 100644
Binary files a/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-chromium-linux.png and b/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-chromium-linux.png differ
diff --git a/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-firefox-linux.png b/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-firefox-linux.png
index 66492cb6bf..d0c58e08f7 100644
Binary files a/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-firefox-linux.png and b/ui-tests/test/menus.spec.ts-snapshots/opened-menu-settings-theme-firefox-linux.png differ
diff --git a/yarn.lock b/yarn.lock
index 9612f052b2..05f1202fea 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2103,6 +2103,7 @@ __metadata:
     "@jupyterlab/shortcuts-extension": ~5.0.0-beta.1
     "@jupyterlab/terminal-extension": ~4.2.0-beta.1
     "@jupyterlab/theme-dark-extension": ~4.2.0-beta.1
+    "@jupyterlab/theme-dark-high-contrast-extension": ~4.2.0-beta.1
     "@jupyterlab/theme-light-extension": ~4.2.0-beta.1
     "@jupyterlab/toc-extension": ~6.2.0-beta.1
     "@jupyterlab/tooltip-extension": ~4.2.0-beta.1
@@ -4181,6 +4182,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jupyterlab/theme-dark-high-contrast-extension@npm:~4.2.0-beta.1":
+  version: 4.2.0-beta.1
+  resolution: "@jupyterlab/theme-dark-high-contrast-extension@npm:4.2.0-beta.1"
+  dependencies:
+    "@jupyterlab/application": ^4.2.0-beta.1
+    "@jupyterlab/apputils": ^4.3.0-beta.1
+    "@jupyterlab/translation": ^4.2.0-beta.1
+  checksum: 6d282b3a7d19b32a608164489bd7f6b1bd9733fb2d3120c6f4fe8af2deaaf54cb57f2d70859e0b4123b3e45b7275852cc31868115768b4deba9e8e94a849a73b
+  languageName: node
+  linkType: hard
+
 "@jupyterlab/theme-light-extension@npm:~4.2.0-beta.1":
   version: 4.2.0-beta.1
   resolution: "@jupyterlab/theme-light-extension@npm:4.2.0-beta.1"