diff --git a/package.json b/package.json
index 951cd104..927787d2 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "delay": "^4.0.1",
     "extend": "^3.0.2",
     "gcp-metadata": "^4.0.0",
-    "parse-duration": "^0.1.1",
+    "parse-duration": "^0.4.4",
     "pprof": "2.0.0",
     "pretty-ms": "^7.0.0",
     "protobufjs": "~6.10.0",
@@ -48,7 +48,6 @@
     "@types/mocha": "^8.0.0",
     "@types/nock": "^10.0.0",
     "@types/node": "^10.0.3",
-    "@types/parse-duration": "^0.1.0",
     "@types/pretty-ms": "^4.0.0",
     "@types/sinon": "^9.0.0",
     "@types/tmp": "0.2.0",
diff --git a/src/config.ts b/src/config.ts
index 577e230d..d89c4963 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import {GoogleAuthOptions} from '@google-cloud/common';
-import parseDuration = require('parse-duration');
+import parseDuration from 'parse-duration';
 
 // Configuration for Profiler.
 export interface Config extends GoogleAuthOptions {
diff --git a/src/profiler.ts b/src/profiler.ts
index 89d9c5fe..61e2f910 100644
--- a/src/profiler.ts
+++ b/src/profiler.ts
@@ -17,6 +17,7 @@ import {
   ServiceConfig,
   ServiceObject,
   ApiError,
+  DecorateRequestOptions,
 } from '@google-cloud/common';
 import {heap as heapProfiler, SourceMapper, time as timeProfiler} from 'pprof';
 import * as msToStr from 'pretty-ms';
@@ -28,7 +29,7 @@ import {perftools} from '../protos/profile';
 import {ProfilerConfig} from './config';
 import {createLogger} from './logger';
 
-import parseDuration = require('parse-duration');
+import parseDuration from 'parse-duration';
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const pjson = require('../../package.json');
 const SCOPE = 'https://www.googleapis.com/auth/monitoring.write';
@@ -110,7 +111,7 @@ function getServerResponseBackoff(body: object): number | undefined {
         item.retryDelay &&
         typeof item.retryDelay === 'string'
       ) {
-        const backoffMillis = parseDuration(item.retryDelay);
+        const backoffMillis = parseDuration(item.retryDelay)!;
         if (backoffMillis > 0) {
           return backoffMillis;
         }
@@ -135,7 +136,7 @@ export function parseBackoffDuration(
     undefined,
   ];
   if (duration) {
-    const backoffMillis = parseDuration(duration);
+    const backoffMillis = parseDuration(duration)!;
     if (backoffMillis > 0) {
       return backoffMillis;
     }
@@ -434,7 +435,7 @@ export class Profiler extends ServiceObject {
       deployment: this.deployment,
       profileType: this.profileTypes,
     };
-    const options = {
+    const options: DecorateRequestOptions = {
       method: 'POST',
       uri: '/profiles',
       body: reqBody,
@@ -444,7 +445,7 @@ export class Profiler extends ServiceObject {
       // Default timeout for for a request is 1 minute, but request to create
       // profile is designed to hang until it is time to collect a profile
       // (up to one hour).
-      timeout: parseDuration('1h'),
+      timeout: parseDuration('1h')!,
     };
 
     this.logger.debug('Attempting to create profile.');
diff --git a/test/test-profiler.ts b/test/test-profiler.ts
index 71565364..9251fb6d 100644
--- a/test/test-profiler.ts
+++ b/test/test-profiler.ts
@@ -37,7 +37,7 @@ import {
   timeProfile,
 } from './profiles-for-tests';
 
-import parseDuration = require('parse-duration');
+import parseDuration from 'parse-duration';
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const fakeCredentials = require('../../test/fixtures/gcloud-credentials.json');
 
@@ -61,9 +61,9 @@ const testConfig: ProfilerConfig = {
   heapMaxStackDepth: 64,
   ignoreHeapSamplesPath: '@google-cloud/profiler',
   initialBackoffMillis: 1000,
-  backoffCapMillis: parseDuration('1h'),
+  backoffCapMillis: parseDuration('1h')!,
   backoffMultiplier: 1.3,
-  serverBackoffCapMillis: parseDuration('7d'),
+  serverBackoffCapMillis: parseDuration('7d')!,
   localProfilingPeriodMillis: 1000,
   localTimeDurationMillis: 1000,
   localLogPeriodMillis: 1000,