diff --git a/package.json b/package.json
index 8bf99ab6..3880ebfd 100644
--- a/package.json
+++ b/package.json
@@ -56,16 +56,16 @@
   },
   "devDependencies": {
     "@types/mocha": "8.2.2",
-    "@types/node": "14.14.42",
-    "@types/sinon": "10.0.0",
+    "@types/node": "14.17.1",
+    "@types/sinon": "10.0.2",
     "@types/webpack-env": "1.16.0",
-    "@typescript-eslint/eslint-plugin": "4.22.0",
-    "@typescript-eslint/parser": "4.22.0",
-    "codecov": "3.8.1",
-    "eslint": "7.25.0",
+    "@typescript-eslint/eslint-plugin": "4.26.0",
+    "@typescript-eslint/parser": "4.26.0",
+    "codecov": "3.8.2",
+    "eslint": "7.28.0",
     "eslint-plugin-header": "3.1.1",
-    "eslint-plugin-import": "2.22.1",
-    "gh-pages": "3.1.0",
+    "eslint-plugin-import": "2.23.4",
+    "gh-pages": "3.2.0",
     "gts": "3.1.0",
     "istanbul-instrumenter-loader": "3.0.1",
     "karma": "5.2.3",
@@ -78,11 +78,11 @@
     "linkinator": "2.13.6",
     "mocha": "7.2.0",
     "nyc": "15.1.0",
-    "sinon": "10.0.0",
+    "sinon": "11.1.1",
     "ts-loader": "8.2.0",
     "ts-mocha": "8.0.0",
-    "typedoc": "0.20.36",
-    "typescript": "4.2.4",
+    "typedoc": "0.21.0-beta.1",
+    "typescript": "4.3.2",
     "webpack": "4.46.0"
   }
 }
diff --git a/test/api/api.test.ts b/test/api/api.test.ts
index 7f6bce84..f5a86cbc 100644
--- a/test/api/api.test.ts
+++ b/test/api/api.test.ts
@@ -94,13 +94,13 @@ describe('API', () => {
     });
 
     class TestTracer extends NoopTracer {
-      startSpan(name: string, options?: SpanOptions): Span {
+      override startSpan(name: string, options?: SpanOptions): Span {
         return dummySpan;
       }
     }
 
     class TestTracerProvider extends NoopTracerProvider {
-      getTracer(_name: string, version?: string) {
+      override getTracer(_name: string, version?: string) {
         return new TestTracer();
       }
     }
diff --git a/tsconfig.json b/tsconfig.json
index 174714d7..16e952fa 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,6 +10,7 @@
     "noFallthroughCasesInSwitch": true,
     "noImplicitReturns": true,
     "noUnusedLocals": true,
+    "noImplicitOverride": true,
     "outDir": "build",
     "pretty": true,
     "rootDir": ".",