diff --git a/package.json b/package.json
index ce193a5..57d5384 100644
--- a/package.json
+++ b/package.json
@@ -64,15 +64,15 @@
   "size-limit": [
     {
       "path": "dist/react-screen-wake-lock.production.js",
-      "limit": "420 B"
+      "limit": "389 B"
     },
     {
       "path": "dist/react-screen-wake-lock.module.js",
-      "limit": "450 B"
+      "limit": "411 B"
     },
     {
       "path": "dist/react-screen-wake-lock.umd.js",
-      "limit": "435 B"
+      "limit": "395 B"
     }
   ],
   "devDependencies": {
@@ -107,7 +107,6 @@
     "size-limit": "^4.9.0",
     "tiny-warning": "^1.0.3",
     "ts-jest": "^26.4.4",
-    "tslib": "^2.0.3",
     "typescript": "^4.1.2"
   },
   "lint-staged": {
diff --git a/src/use-wake-lock.ts b/src/use-wake-lock.ts
index e3be380..3235b7e 100644
--- a/src/use-wake-lock.ts
+++ b/src/use-wake-lock.ts
@@ -20,17 +20,14 @@ export const useWakeLock = ({
 
   const request = React.useCallback(
     async (type: WakeLockType = 'screen') => {
-      if (!isSupported) {
+      const isWakeLockAlreadyDefined = wakeLock.current != null;
+      if (!isSupported || isWakeLockAlreadyDefined) {
         warning(
           !isSupported,
           "Calling the `request` function has no effect, Wake Lock Screen API isn't supported"
         );
-        return;
-      }
-
-      if (wakeLock.current != null) {
         warning(
-          wakeLock.current != null,
+          isWakeLockAlreadyDefined,
           'Calling `request` multiple times without `release` has no effect'
         );
         return;
@@ -41,38 +38,36 @@ export const useWakeLock = ({
 
         wakeLock.current.onrelease = (e: Event) => {
           // Default to `true` - `released` API is experimental: https://caniuse.com/mdn-api_wakelocksentinel_released
-          setReleased(wakeLock.current?.released ?? true);
-          onRelease?.(e);
+          setReleased((wakeLock.current && wakeLock.current.released) ?? true);
+          onRelease && onRelease(e);
           wakeLock.current = null;
         };
 
         onRequest?.();
-        setReleased(wakeLock.current.released ?? false);
+        setReleased((wakeLock.current && wakeLock.current.released) ?? false);
       } catch (error) {
-        onError?.(error);
+        onError && onError(error);
       }
     },
     [isSupported, onRequest, onError, onRelease]
   );
 
   const release = React.useCallback(async () => {
-    if (!isSupported) {
+    const isWakeLockUndefined = wakeLock.current == null;
+    if (!isSupported || isWakeLockUndefined) {
       warning(
         !isSupported,
         "Calling the `release` function has no effect, Wake Lock Screen API isn't supported"
       );
-      return;
-    }
 
-    if (wakeLock.current == null) {
       warning(
-        wakeLock.current == null,
+        isWakeLockUndefined,
         'Calling `release` before `request` has no effect.'
       );
       return;
     }
 
-    await wakeLock.current?.release();
+    wakeLock.current && (await wakeLock.current.release());
   }, [isSupported]);
 
   return {
@@ -80,6 +75,6 @@ export const useWakeLock = ({
     request,
     released,
     release,
-    type: wakeLock?.current?.type,
+    type: (wakeLock.current && wakeLock.current.type) || undefined,
   };
 };
diff --git a/yarn.lock b/yarn.lock
index 680da44..51057bc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11478,11 +11478,6 @@ tslib@^1.13.0, tslib@^1.8.1, tslib@^1.9.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"
   integrity sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==
 
-tslib@^2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.0.3.tgz#8e0741ac45fc0c226e58a17bfc3e64b9bc6ca61c"
-  integrity sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ==
-
 tsutils@^3.17.1:
   version "3.17.1"
   resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.17.1.tgz#ed719917f11ca0dee586272b2ac49e015a2dd759"