diff --git a/package-lock.json b/package-lock.json
index be40b44c..dc5c6681 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -332,19 +332,13 @@
       "integrity": "sha512-TMDN26Q4J+Sh+OPqAx8BK5Q/3hAAmcTAUQ9wvC9nboSOAmYUaHGz8t21yGdeUtRtunIfMpjTnwLa+X2Pfoq42w=="
     },
     "@swimlane/ngx-dnd": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/@swimlane/ngx-dnd/-/ngx-dnd-3.1.2.tgz",
-      "integrity": "sha512-jwZxW+s8sI8fk2HfgiuzhLhju2JPiDrqjJHHD2lQlLPikfPdjPasXYdiZSKp/2WDsEuj3a9fkGjpN4s2gPayuQ==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@swimlane/ngx-dnd/-/ngx-dnd-3.1.0.tgz",
+      "integrity": "sha512-Ph7fpK+H8OkS7TyFjNGRn+sLwrmvJbnx9hieiTlKtEgB9kGU39qkZx6eGBdzs5MOsLRd8OP8DnVhiuf4XSm7cA==",
       "requires": {
-        "@types/dragula": "2.1.32",
         "dragula": "3.7.2"
       }
     },
-    "@types/dragula": {
-      "version": "2.1.32",
-      "resolved": "https://registry.npmjs.org/@types/dragula/-/dragula-2.1.32.tgz",
-      "integrity": "sha512-67nXH/pjZPTrbQ+Sr/Wy/luKVJPOOy7ErML58TgoO4A0vokIvvSt3+x1FHwp6Q455Kj03xGjCyHkhaelAdQMWA=="
-    },
     "@types/jasmine": {
       "version": "2.8.6",
       "resolved": "https://registry.npmjs.org/@types/jasmine/-/jasmine-2.8.6.tgz",
diff --git a/package.json b/package.json
index 4f872368..28fc82ee 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@ngx-translate/core": "9.1.1",
     "@swimlane/ngx-charts": "7.0.1",
     "@swimlane/ngx-datatable": "11.1.7",
-    "@swimlane/ngx-dnd": "3.1.2",
+    "@swimlane/ngx-dnd": "3.1.0",
     "@types/prismjs": "1.9.0",
     "angular-calendar": "0.23.3",
     "angular-in-memory-web-api": "0.5.3",
diff --git a/src/app/main/content/apps/chat/sidenavs/left/user/user.component.ts b/src/app/main/content/apps/chat/sidenavs/left/user/user.component.ts
index d0db48fd..2ef84ffb 100644
--- a/src/app/main/content/apps/chat/sidenavs/left/user/user.component.ts
+++ b/src/app/main/content/apps/chat/sidenavs/left/user/user.component.ts
@@ -1,6 +1,7 @@
 import { Component, OnDestroy, OnInit } from '@angular/core';
 import { ChatService } from '../../../chat.service';
 import { FormControl, FormGroup } from '@angular/forms';
+import 'rxjs/add/operator/debounceTime';
 import 'rxjs/add/operator/distinctUntilChanged';
 
 @Component({
diff --git a/src/app/main/content/apps/contacts/contacts.component.ts b/src/app/main/content/apps/contacts/contacts.component.ts
index 67761196..9cf13b58 100644
--- a/src/app/main/content/apps/contacts/contacts.component.ts
+++ b/src/app/main/content/apps/contacts/contacts.component.ts
@@ -4,6 +4,7 @@ import { fuseAnimations } from '../../../../core/animations';
 import { FormControl, FormGroup } from '@angular/forms';
 import { FuseContactsContactFormDialogComponent } from './contact-form/contact-form.component';
 import { MatDialog } from '@angular/material';
+import 'rxjs/add/operator/debounceTime';
 import 'rxjs/add/operator/distinctUntilChanged';
 import { Subscription } from 'rxjs/Subscription';
 
diff --git a/src/app/main/content/apps/todo/todo-details/todo-details.component.ts b/src/app/main/content/apps/todo/todo-details/todo-details.component.ts
index 27c2ef83..9369dc3f 100644
--- a/src/app/main/content/apps/todo/todo-details/todo-details.component.ts
+++ b/src/app/main/content/apps/todo/todo-details/todo-details.component.ts
@@ -5,6 +5,7 @@ import { Subscription } from 'rxjs/Subscription';
 import { FormBuilder, FormGroup } from '@angular/forms';
 import { FuseUtils } from '../../../../../core/fuseUtils';
 import { fuseAnimations } from '../../../../../core/animations';
+import 'rxjs/add/operator/debounceTime';
 import 'rxjs/add/operator/distinctUntilChanged';
 
 @Component({
diff --git a/src/app/main/content/apps/todo/todo.component.ts b/src/app/main/content/apps/todo/todo.component.ts
index c9946d0f..ba7bc4a2 100644
--- a/src/app/main/content/apps/todo/todo.component.ts
+++ b/src/app/main/content/apps/todo/todo.component.ts
@@ -4,6 +4,7 @@ import { TodoService } from './todo.service';
 import { FormControl } from '@angular/forms';
 import { Todo } from './todo.model';
 import { fuseAnimations } from '../../../../core/animations';
+import 'rxjs/add/operator/debounceTime';
 import 'rxjs/add/operator/distinctUntilChanged';
 
 @Component({
diff --git a/src/app/main/content/pages/faq/faq.component.ts b/src/app/main/content/pages/faq/faq.component.ts
index faf506de..54670fb2 100644
--- a/src/app/main/content/pages/faq/faq.component.ts
+++ b/src/app/main/content/pages/faq/faq.component.ts
@@ -3,6 +3,7 @@ import { FormControl } from '@angular/forms';
 import { Subscription } from 'rxjs/Subscription';
 import { FaqService } from './faq.service';
 import { FuseUtils } from '../../../../core/fuseUtils';
+import 'rxjs/add/operator/debounceTime';
 import 'rxjs/add/operator/distinctUntilChanged';
 
 @Component({