diff --git a/package.json b/package.json
index b929b90..d9936de 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
         "@clr/icons": "^2.3.7",
         "@clr/ui": "^2.3.7",
         "core-js": "^2.5.4",
-        "ngx-clipboard": "13.0.0-beta06",
+        "ngx-clipboard": "^13.0.1",
         "ngx-window-token": "3.0.0-beta01",
         "rxjs": "~6.5.4",
         "tslib": "^1.10.0",
diff --git a/projects/ngx-clipboard/package.json b/projects/ngx-clipboard/package.json
index aee316f..981121f 100644
--- a/projects/ngx-clipboard/package.json
+++ b/projects/ngx-clipboard/package.json
@@ -1,7 +1,7 @@
 {
     "name": "ngx-clipboard",
     "description": "angular 2 clipboard",
-    "version": "13.0.0",
+    "version": "13.0.1",
     "author": {
         "name": "Sam Lin",
         "email": "maxisam@gmail.com"
@@ -22,7 +22,7 @@
         "copy"
     ],
     "dependencies": {
-        "ngx-window-token": ">= 3.0.0-beta01 || >= 3.0.0"
+        "ngx-window-token": ">=3.0.0"
     },
     "peerDependencies": {
         "@angular/common": ">=9.0.0",
diff --git a/projects/ngx-clipboard/src/lib/ngx-clipboard.directive.ts b/projects/ngx-clipboard/src/lib/ngx-clipboard.directive.ts
index 8cc563c..ed28b8a 100644
--- a/projects/ngx-clipboard/src/lib/ngx-clipboard.directive.ts
+++ b/projects/ngx-clipboard/src/lib/ngx-clipboard.directive.ts
@@ -7,14 +7,15 @@ import { ClipboardService } from './ngx-clipboard.service';
     selector: '[ngxClipboard]'
 })
 export class ClipboardDirective implements OnInit, OnDestroy {
+    // https://github.com/maxisam/ngx-clipboard/issues/239#issuecomment-623330624
     // tslint:disable-next-line:no-input-rename
     @Input('ngxClipboard')
-    public targetElm: HTMLInputElement | HTMLTextAreaElement;
+    public targetElm: HTMLInputElement | HTMLTextAreaElement | undefined | '';
     @Input()
     public container: HTMLElement;
 
     @Input()
-    public cbContent: string;
+    public cbContent: string | undefined;
 
     @Input()
     public cbSuccessMsg: string;
diff --git a/projects/ngx-clipboard/src/lib/ngx-clipboard.service.ts b/projects/ngx-clipboard/src/lib/ngx-clipboard.service.ts
index 0a1cf38..15d823c 100644
--- a/projects/ngx-clipboard/src/lib/ngx-clipboard.service.ts
+++ b/projects/ngx-clipboard/src/lib/ngx-clipboard.service.ts
@@ -81,7 +81,7 @@ export class ClipboardService {
         // check if the temp textarea still belongs to the current container.
         // In case we have multiple places using ngx-clipboard, one is in a modal using container but the other one is not.
         if (this.tempTextArea && !container.contains(this.tempTextArea)) {
-            this.destroy(this.tempTextArea.parentElement);
+            this.destroy(this.tempTextArea.parentElement || undefined);
         }
 
         if (!this.tempTextArea) {
@@ -96,7 +96,7 @@ export class ClipboardService {
 
         const toReturn = this.copyFromInputElement(this.tempTextArea, false);
         if (this.config.cleanUpAfterCopy) {
-            this.destroy(this.tempTextArea.parentElement);
+            this.destroy(this.tempTextArea.parentElement || undefined);
         }
         return toReturn;
     }
@@ -128,9 +128,9 @@ export class ClipboardService {
     /**
      * Moves focus away from `target` and back to the trigger, removes current selection.
      */
-    private clearSelection(inputElement: HTMLInputElement | HTMLTextAreaElement, window: Window): void {
+    private clearSelection(inputElement: HTMLInputElement | HTMLTextAreaElement | undefined, window: Window): void {
         inputElement && inputElement.focus();
-        window.getSelection().removeAllRanges();
+        window.getSelection()?.removeAllRanges();
     }
 
     /**
diff --git a/tsconfig.json b/tsconfig.json
index 40a185c..f9c63cc 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,6 +10,7 @@
         "module": "esnext",
         "moduleResolution": "node",
         "importHelpers": true,
+        "strictNullChecks": true,
         "target": "es2015",
         "typeRoots": ["node_modules/@types"],
         "lib": ["es2018", "dom"],
@@ -19,6 +20,7 @@
     },
     "angularCompilerOptions": {
         "fullTemplateTypeCheck": true,
-        "strictInjectionParameters": true
+        "strictInjectionParameters": true,
+        "strictTemplates": true
     }
 }
diff --git a/yarn.lock b/yarn.lock
index f667a99..28ad096 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6767,18 +6767,23 @@ ng-packagr@^9.0.0:
     terser "^4.3.8"
     update-notifier "^4.0.0"
 
-ngx-clipboard@13.0.0-beta06:
-  version "13.0.0-beta06"
-  resolved "https://registry.yarnpkg.com/ngx-clipboard/-/ngx-clipboard-13.0.0-beta06.tgz#97e0dc6864c65c2222c278917cabbf35982a1924"
-  integrity sha512-sT2ZSHUczXhjxBxhtpry2BPn55LUOfk6Cz0i2Cc43SLYurMw3Q5W432mUu5kiRWIIB/zg/TVEacRFcSq2umx8w==
+ngx-clipboard@^13.0.1:
+  version "13.0.1"
+  resolved "https://registry.yarnpkg.com/ngx-clipboard/-/ngx-clipboard-13.0.1.tgz#393239d1a8f0ada8b99ef2d3ac80bc245c9ba3fe"
+  integrity sha512-e7QBsw7bX5ajhVR2++NAaYZYw90hKeEBlb006TW85WDUA3kmlrXpMDwOvVJuRewU6Nh+U1QiQMJq5a0ivk0zWg==
   dependencies:
-    ngx-window-token ">= 3.0.0-beta01 || >= 3.0.0"
+    ngx-window-token ">=3.0.0"
 
-ngx-window-token@3.0.0-beta01, "ngx-window-token@>= 3.0.0-beta01 || >= 3.0.0":
+ngx-window-token@3.0.0-beta01:
   version "3.0.0-beta01"
   resolved "https://registry.yarnpkg.com/ngx-window-token/-/ngx-window-token-3.0.0-beta01.tgz#8cd0e9103b435f3b0da72e4d039988b62989c2fc"
   integrity sha512-EOH0SMhqwl4916W9rAo4o58egqbWSMeIhNhO2zDaLT5YfTtULjhFf+kWeOrgT1MLnNo0fRt5XvWxZtimB1hETw==
 
+ngx-window-token@>=3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/ngx-window-token/-/ngx-window-token-3.0.0.tgz#a5419befb133c6226e3e570737a247e66c825ab7"
+  integrity sha512-MDVIQB2SqFCbpoTqEXhO2529hsvpCYyw/iogjU6uskKqUKh79XVKWSMpRH9S1yTr0Ucgh8nFeNcpv2DnFdikJA==
+
 nice-try@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"