diff --git a/package.json b/package.json
index 82615778a940..4712465c87b7 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@types/chai": "4.2.0",
     "@types/chai-as-promised": "^7.1.2",
     "@types/mocha": "^8.0.3",
-    "@types/node": "^14.14.17",
+    "@types/node": "^18.6.1",
     "@types/sinon": "^9.0.0",
     "@typescript-eslint/eslint-plugin": "5.26.0",
     "@typescript-eslint/parser": "5.26.0",
diff --git a/packages/beacon-node/src/chain/clock/LocalClock.ts b/packages/beacon-node/src/chain/clock/LocalClock.ts
index da4fa6bd5661..79142eaad99f 100644
--- a/packages/beacon-node/src/chain/clock/LocalClock.ts
+++ b/packages/beacon-node/src/chain/clock/LocalClock.ts
@@ -14,7 +14,7 @@ import {IBeaconClock} from "./interface.js";
 export class LocalClock implements IBeaconClock {
   private readonly config: IChainForkConfig;
   private readonly genesisTime: number;
-  private timeoutId: number;
+  private timeoutId: NodeJS.Timeout;
   private readonly emitter: ChainEventEmitter;
   private readonly signal: AbortSignal;
   private _currentSlot: number;
diff --git a/packages/beacon-node/test/memory/testRunnerMemory.ts b/packages/beacon-node/test/memory/testRunnerMemory.ts
index 527546b1654b..8fb6f3e71773 100644
--- a/packages/beacon-node/test/memory/testRunnerMemory.ts
+++ b/packages/beacon-node/test/memory/testRunnerMemory.ts
@@ -8,6 +8,10 @@ export type TestRunnerMemoryOpts<T> = {
   convergeFactor?: number;
 };
 
+if (global.gc === undefined) {
+  throw Error("Must enable global.gc");
+}
+
 export async function testRunnerMemoryGc<T>(opts: TestRunnerMemoryOpts<T>): Promise<void> {
   const {
     getInstance,
@@ -25,11 +29,11 @@ export async function testRunnerMemoryGc<T>(opts: TestRunnerMemoryOpts<T>): Prom
   const usedMemoryArr: number[] = [];
 
   for (let n = 0; n < rounds; n++) {
-    global.gc();
-    global.gc();
+    global.gc?.();
+    global.gc?.();
     await new Promise((r) => setTimeout(r, 100));
-    global.gc();
-    global.gc();
+    global.gc?.();
+    global.gc?.();
 
     const totalUsedMemoryPrev = computeUsedMemory(process.memoryUsage());
 
@@ -38,11 +42,11 @@ export async function testRunnerMemoryGc<T>(opts: TestRunnerMemoryOpts<T>): Prom
       refs.push(getInstance(i));
     }
 
-    global.gc();
-    global.gc();
+    global.gc?.();
+    global.gc?.();
     await new Promise((r) => setTimeout(r, 100));
-    global.gc();
-    global.gc();
+    global.gc?.();
+    global.gc?.();
 
     const totalUsedMemory = computeUsedMemory(process.memoryUsage());
 
@@ -98,8 +102,8 @@ export function testRunnerMemory<T>(opts: TestRunnerMemoryOpts<T>): number {
     // local vars will get garbage collected and won't show up in the .m result
 
     if (i % sampleEvery === 0) {
-      global.gc();
-      global.gc();
+      global.gc?.();
+      global.gc?.();
 
       const memoryUsage = process.memoryUsage();
       const usedMemory = computeUsedMemory(memoryUsage);
diff --git a/yarn.lock b/yarn.lock
index 7d8558f537a0..320c78b1f8ba 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2573,9 +2573,9 @@
   integrity sha512-fZQQafSREFyuZcdWFAExYjBiCL7AUCdgsk80iO0q4yihYYdcIiH28CcuPTGFgLOCC8RlW49GSQxdHwZP+I7CNg==
 
 "@types/minipass@*":
-  version "2.2.0"
-  resolved "https://registry.npmjs.org/@types/minipass/-/minipass-2.2.0.tgz"
-  integrity sha512-wuzZksN4w4kyfoOv/dlpov4NOunwutLA/q7uc00xU02ZyUY+aoM5PWIXEKBMnm0NHd4a+N71BMjq+x7+2Af1fg==
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/@types/minipass/-/minipass-3.1.2.tgz#e2d7f9df0698aff421dcf145b4fc05b8183b9030"
+  integrity sha512-foLGjgrJkUjLG/o2t2ymlZGEoBNBa/TfoUZ7oCTkOjP1T43UGBJspovJou/l3ZuHvye2ewR5cZNtp2zyWgILMA==
   dependencies:
     "@types/node" "*"
 
@@ -2602,7 +2602,7 @@
     "@types/node" "*"
     form-data "^3.0.0"
 
-"@types/node@*", "@types/node@^14.14.17":
+"@types/node@*":
   version "14.14.43"
   resolved "https://registry.npmjs.org/@types/node/-/node-14.14.43.tgz"
   integrity sha512-3pwDJjp1PWacPTpH0LcfhgjvurQvrZFBrC6xxjaUEZ7ifUtT32jtjPxEMMblpqd2Mvx+k8haqQJLQxolyGN/cQ==
@@ -2617,6 +2617,11 @@
   resolved "https://registry.npmjs.org/@types/node/-/node-16.6.2.tgz"
   integrity sha512-LSw8TZt12ZudbpHc6EkIyDM3nHVWKYrAvGy6EAJfNfjusbwnThqjqxUKKRwuV3iWYeW/LYMzNgaq3MaLffQ2xA==
 
+"@types/node@^18.6.1":
+  version "18.6.1"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-18.6.1.tgz#828e4785ccca13f44e2fb6852ae0ef11e3e20ba5"
+  integrity sha512-z+2vB6yDt1fNwKOeGbckpmirO+VBDuQqecXkgeIqDlaOtmKn6hPR/viQ8cxCfqLU4fTlvM3+YjM367TukWdxpg==
+
 "@types/normalize-package-data@^2.4.0":
   version "2.4.0"
   resolved "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz"