diff --git a/devtools/client/performance-new/package.json b/devtools/client/performance-new/package.json
index ecfc4166618b..907bdde24444 100644
--- a/devtools/client/performance-new/package.json
+++ b/devtools/client/performance-new/package.json
@@ -7,10 +7,9 @@
   },
   "license": "MPL-2.0",
   "devDependencies": {
-    "@types/react": "^16.9.10",
     "@types/react-dom-factories": "^1.0.2",
-    "@types/react-redux": "^7.1.5",
+    "@types/react-redux": "^7.1.18",
     "@types/redux": "^3.6.0",
-    "typescript": "^3.8.3"
+    "typescript": "^4.3.5"
   }
 }
diff --git a/devtools/client/performance-new/popup/panel.jsm.js b/devtools/client/performance-new/popup/panel.jsm.js
index 9109d01484e8..c9c37d20ac26 100644
--- a/devtools/client/performance-new/popup/panel.jsm.js
+++ b/devtools/client/performance-new/popup/panel.jsm.js
@@ -58,10 +58,16 @@ function selectElementsInPanelview(panelview) {
     return element;
   }
 
+  // Forcefully cast the window to the type ChromeWindow.
+  /** @type {any} */
+  const chromeWindowAny = document.defaultView;
+  /** @type {ChromeWindow} */
+  const chromeWindow = chromeWindowAny;
+
   return {
     document,
     panelview,
-    window: /** @type {ChromeWindow} */ (document.defaultView),
+    window: chromeWindow,
     inactive: getElementById("PanelUI-profiler-inactive"),
     active: getElementById("PanelUI-profiler-active"),
     locked: getElementById("PanelUI-profiler-locked"),
diff --git a/devtools/client/performance-new/yarn.lock b/devtools/client/performance-new/yarn.lock
index 5f9ef4f4af5d..ea21bc13f5ae 100644
--- a/devtools/client/performance-new/yarn.lock
+++ b/devtools/client/performance-new/yarn.lock
@@ -22,17 +22,17 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react-redux@^7.1.5":
-  version "7.1.5"
-  resolved "https://registry.yarnpkg.com/@types/react-redux/-/react-redux-7.1.5.tgz#c7a528d538969250347aa53c52241051cf886bd3"
-  integrity sha512-ZoNGQMDxh5ENY7PzU7MVonxDzS1l/EWiy8nUhDqxFqUZn4ovboCyvk4Djf68x6COb7vhGTKjyjxHxtFdAA5sUA==
+"@types/react-redux@^7.1.18":
+  version "7.1.18"
+  resolved "https://registry.yarnpkg.com/@types/react-redux/-/react-redux-7.1.18.tgz#2bf8fd56ebaae679a90ebffe48ff73717c438e04"
+  integrity sha512-9iwAsPyJ9DLTRH+OFeIrm9cAbIj1i2ANL3sKQFATqnPWRbg+jEFXyZOKHiQK/N86pNRXbb4HRxAxo0SIX1XwzQ==
   dependencies:
     "@types/hoist-non-react-statics" "^3.3.0"
     "@types/react" "*"
     hoist-non-react-statics "^3.3.0"
     redux "^4.0.0"
 
-"@types/react@*", "@types/react@^16.9.10":
+"@types/react@*":
   version "16.9.10"
   resolved "https://registry.yarnpkg.com/@types/react/-/react-16.9.10.tgz#87c2a7cd715d293c42fe73510eec42cba3ee8210"
   integrity sha512-J1sinqwBCzazC+DOmbwRc96pNf0KBOVkefV5DVfLX9qiHdltfFH2BUqc36UYcYSU5tIrZtaaVMAx4JwOq5/Q/g==
@@ -89,7 +89,7 @@ symbol-observable@^1.2.0:
   resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.2.0.tgz#c22688aed4eab3cdc2dfeacbb561660560a00804"
   integrity sha512-e900nM8RRtGhlV36KGEU9k65K3mPb1WV70OdjfxlG2EAuM1noi/E/BaW/uMhL7bPEssK8QV57vN3esixjUvcXQ==
 
-typescript@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@^4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
+  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==