diff --git a/index.ts b/index.ts
index dba5362..a5f7c6d 100644
--- a/index.ts
+++ b/index.ts
@@ -246,13 +246,13 @@ class OptionsSync<UserOptions extends Options> {
 		await saveFile(text, extension.name + ' options.json');
 	};
 
-	private _log(method: 'log' | 'info', ...args: any[]): void {
+	private _log(method: 'log' | 'info', ...args: unknown[]): void {
 		console[method](...args);
 	}
 
 	private async _getAll(): Promise<UserOptions> {
 		const result = await this.storage.get(this.storageName);
-		return this._decode(result[this.storageName]);
+		return this._decode(result[this.storageName] as UserOptions);
 	}
 
 	private async _setAll(newOptions: UserOptions): Promise<void> {
@@ -352,13 +352,13 @@ class OptionsSync<UserOptions extends Options> {
 		return serialize(form, {include});
 	}
 
-	private readonly _handleStorageChangeOnForm = (changes: Record<string, any>, areaName: string): void => {
+	private readonly _handleStorageChangeOnForm = (changes: Record<string, chrome.storage.StorageChange>, areaName: string): void => {
 		if (
 			areaName === this.storageType
-			&& changes[this.storageName]
+			&& this.storageName in changes
 			&& (!document.hasFocus() || !this._form!.contains(document.activeElement)) // Avoid applying changes while the user is editing a field
 		) {
-			this._updateForm(this._form!, this._decode(changes[this.storageName].newValue));
+			this._updateForm(this._form!, this._decode(changes[this.storageName]!.newValue as string));
 		}
 	};
 }
diff --git a/package.json b/package.json
index 630e93c..0c18702 100644
--- a/package.json
+++ b/package.json
@@ -49,24 +49,24 @@
 	},
 	"dependencies": {
 		"dom-form-serializer": "^2.0.0",
-		"lz-string": "^1.4.4",
+		"lz-string": "^1.5.0",
 		"throttle-debounce": "^5.0.0",
-		"webext-detect-page": "^4.0.1",
-		"webext-events": "^1.1.0",
-		"webext-polyfill-kinda": "^1.0.0"
+		"webext-detect-page": "^4.1.1",
+		"webext-events": "^2.0.0",
+		"webext-polyfill-kinda": "^1.0.2"
 	},
 	"devDependencies": {
-		"@sindresorhus/tsconfig": "^3.0.1",
-		"@types/chrome": "0.0.210",
+		"@sindresorhus/tsconfig": "^4.0.0",
+		"@types/chrome": "0.0.246",
 		"@types/lz-string": "^1.3.34",
 		"@types/throttle-debounce": "^5.0.0",
-		"@types/wicg-file-system-access": "^2020.9.5",
-		"ava": "^5.1.1",
+		"@types/wicg-file-system-access": "^2020.9.6",
+		"ava": "^5.3.1",
 		"npm-run-all": "^4.1.5",
-		"sinon": "^15.0.1",
+		"sinon": "^16.0.0",
 		"sinon-chrome": "^3.0.1",
-		"type-fest": "^3.5.3",
-		"typescript": "^4.9.4",
-		"xo": "^0.53.1"
+		"type-fest": "^4.3.1",
+		"typescript": "^5.2.2",
+		"xo": "^0.56.0"
 	}
 }
diff --git a/test/index.js b/test/index.js
index a5d09fd..d852289 100644
--- a/test/index.js
+++ b/test/index.js
@@ -168,7 +168,7 @@ test.serial('migrations alter the stored options', async t => {
 				savedOptions.size += 10;
 			},
 			savedOptions => {
-				if (typeof savedOptions.size !== 'undefined') {
+				if (savedOptions.size !== undefined) {
 					savedOptions.minSize = savedOptions.size;
 					delete savedOptions.size;
 				}