diff --git a/ext/package-lock.json b/ext/package-lock.json
index 82b8364..f222b82 100644
--- a/ext/package-lock.json
+++ b/ext/package-lock.json
@@ -87,9 +87,9 @@
             }
         },
         "@types/firefox-webext-browser": {
-            "version": "67.0.2",
-            "resolved": "https://registry.npmjs.org/@types/firefox-webext-browser/-/firefox-webext-browser-67.0.2.tgz",
-            "integrity": "sha512-tXR5THtH5Fqwfmi4y/2dTxCTebqHsKCH2bif/VdE5CPcB/S5x5fu+N+wBuMENzN41agovHMU/LQbtWNV+Aux+w==",
+            "version": "70.0.1",
+            "resolved": "https://registry.npmjs.org/@types/firefox-webext-browser/-/firefox-webext-browser-70.0.1.tgz",
+            "integrity": "sha512-hjHsTR9vKs+yikWbNS/s7TVCx15M/MEn+VYx47wtT/W/wORsIZDD75gfUfP7lkzi+IxRvKMQBB/5/wMFlfgvgQ==",
             "dev": true
         },
         "@types/minimatch": {
diff --git a/ext/package.json b/ext/package.json
index b0223f0..dfc3d00 100644
--- a/ext/package.json
+++ b/ext/package.json
@@ -11,7 +11,7 @@
         "lint": "node bin/lint.js"
     },
     "devDependencies": {
-        "@types/firefox-webext-browser": "^67.0.2",
+        "@types/firefox-webext-browser": "^70.0.1",
         "@types/react": "^16.9.17",
         "@types/react-dom": "^16.9.4",
         "copy-webpack-plugin": "^5.1.1",