diff --git a/package-lock.json b/package-lock.json
index 6756331b..f8711d58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -57,7 +57,7 @@
         "ts-jest": "^27.0.7",
         "ts-node": "^10.4.0",
         "typed-emitter": "^2.1.0",
-        "typescript": "^4.5.2"
+        "typescript": "^4.9.5"
       },
       "engines": {
         "node": ">=18.15.0",
@@ -11741,9 +11741,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.2.tgz",
-      "integrity": "sha512-5BlMof9H1yGt0P8/WF+wPNw6GfctgGjXp5hkblpyT+8rkASSmkUKMXrxR0Xg8ThVCi/JnHQiKXeBaEwCeQwMFw==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -20886,9 +20886,9 @@
       }
     },
     "typescript": {
-      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.2.tgz",
-      "integrity": "sha512-5BlMof9H1yGt0P8/WF+wPNw6GfctgGjXp5hkblpyT+8rkASSmkUKMXrxR0Xg8ThVCi/JnHQiKXeBaEwCeQwMFw==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true
     },
     "unbox-primitive": {
diff --git a/package.json b/package.json
index fba19e79..64e1f1c9 100644
--- a/package.json
+++ b/package.json
@@ -247,7 +247,7 @@
     "ts-jest": "^27.0.7",
     "ts-node": "^10.4.0",
     "typed-emitter": "^2.1.0",
-    "typescript": "^4.5.2"
+    "typescript": "^4.9.5"
   },
   "scripts": {
     "build": "tsc -p tsconfig.src.json",
diff --git a/src/utils/errors.ts b/src/utils/errors.ts
index 9cb7cdf8..e59ac49f 100644
--- a/src/utils/errors.ts
+++ b/src/utils/errors.ts
@@ -20,7 +20,7 @@ export function serializeErrors<T, R extends { [K in keyof T]: T[K] }>(object: T
 		visited: WeakMap<object, unknown>,
 	): RInner => {
 		if (!obj || typeof obj !== 'object') {
-			return obj as RInner;
+			return obj as unknown as RInner;
 		}
 
 		if (visited.has(obj as unknown as object)) {
diff --git a/src/utils/objects/merge-assign.ts b/src/utils/objects/merge-assign.ts
index 904bac85..174fafe7 100644
--- a/src/utils/objects/merge-assign.ts
+++ b/src/utils/objects/merge-assign.ts
@@ -7,7 +7,11 @@ import { isObject } from './is-object';
  * @param source1 The first source object from which to copy properties.
  * @param source2 The second source object from which to copy properties.
  */
-export function mergeAssign<T, U, V>(target: T, source1: U, source2?: V): T & U & V {
+export function mergeAssign<T extends object, U extends object, V extends object>(
+	target: T,
+	source1: U | undefined,
+	source2?: V,
+): T & U & V {
 	const targetAsUnion = target as T & U & V;
 
 	for (const object of [source1, source2]) {
@@ -37,7 +41,9 @@ export function mergeAssign<T, U, V>(target: T, source1: U, source2?: V): T & U
 					targetAsUnion[key] = {} as (T & U & V)[typeof key];
 				}
 
-				targetAsUnion[key] = mergeAssign(targetAsUnion[key], value);
+				targetAsUnion[key] = mergeAssign(targetAsUnion[key] as object, value) as (T &
+					U &
+					V)[typeof key];
 			} else {
 				targetAsUnion[key] = value as (T & U & V)[typeof key];
 			}