diff --git a/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.html b/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.html
index 6802768303..be3a2ead31 100644
--- a/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.html
+++ b/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.html
@@ -93,17 +93,17 @@
       </mat-form-field>
       <section *ngIf="isAdd">
         <div class="mat-caption" style="margin: -8px 0 8px;" translate>ota-update.warning-after-save-no-edit</div>
-        <mat-radio-group formControlName="resource" fxLayoutGap="16px">
-          <mat-radio-button value="file">Upload binary file</mat-radio-button>
-          <mat-radio-button value="url">Use external URL</mat-radio-button>
+        <mat-radio-group formControlName="isURL" fxLayoutGap="16px">
+          <mat-radio-button [value]="false">Upload binary file</mat-radio-button>
+          <mat-radio-button [value]="true">Use external URL</mat-radio-button>
         </mat-radio-group>
       </section>
-      <section *ngIf="entityForm.get('resource').value === 'file'">
+      <section *ngIf="!entityForm.get('isURL').value">
         <section *ngIf="isAdd">
           <tb-file-input
             formControlName="file"
             workFromFileObj="true"
-            [required]="entityForm.get('resource').value === 'file'"
+            [required]="!entityForm.get('isURL').value"
             dropLabel="{{'ota-update.drop-file' | translate}}">
           </tb-file-input>
           <mat-checkbox formControlName="generateChecksum" style="margin-top: 16px">
@@ -143,12 +143,12 @@
           </div>
         </section>
       </section>
-      <section *ngIf="entityForm.get('resource').value === 'url'" style="margin-top: 8px">
+      <section *ngIf="entityForm.get('isURL').value" style="margin-top: 8px">
         <mat-form-field class="mat-block">
           <mat-label translate>ota-update.direct-url</mat-label>
           <input matInput formControlName="url"
                  type="text"
-                 [required]="entityForm.get('resource').value === 'url'">
+                 [required]="entityForm.get('isURL').value">
           <mat-error *ngIf="entityForm.get('url').hasError('required') || entityForm.get('url').hasError('pattern')" translate>
             ota-update.direct-url-required
           </mat-error>
diff --git a/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.ts b/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.ts
index 0c2d82e171..9fd51302e1 100644
--- a/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/ota-update/ota-update.component.ts
@@ -56,11 +56,11 @@ export class OtaUpdateComponent extends EntityComponent<OtaPackage> implements O
 
   ngOnInit() {
     super.ngOnInit();
-    this.entityForm.get('resource').valueChanges.pipe(
+    this.entityForm.get('isURL').valueChanges.pipe(
       filter(() => this.isAdd),
       takeUntil(this.destroy$)
-    ).subscribe((resource) => {
-      if (resource === 'file') {
+    ).subscribe((isURL) => {
+      if (isURL === false) {
         this.entityForm.get('url').clearValidators();
         this.entityForm.get('file').setValidators(Validators.required);
         this.entityForm.get('url').updateValueAndValidity({emitEvent: false});
@@ -97,7 +97,7 @@ export class OtaUpdateComponent extends EntityComponent<OtaPackage> implements O
       checksumAlgorithm: [entity && entity.checksumAlgorithm ? entity.checksumAlgorithm : ChecksumAlgorithm.SHA256],
       checksum: [entity ? entity.checksum : '', Validators.maxLength(1020)],
       url: [entity ? entity.url : ''],
-      resource: ['file'],
+      isURL: [false],
       additionalInfo: this.fb.group(
         {
           description: [entity && entity.additionalInfo ? entity.additionalInfo.description : ''],
@@ -127,7 +127,7 @@ export class OtaUpdateComponent extends EntityComponent<OtaPackage> implements O
       dataSize: entity.dataSize,
       contentType: entity.contentType,
       url: entity.url,
-      resource: isNotEmptyStr(entity.url) ? 'url' : 'file',
+      isURL: isNotEmptyStr(entity.url),
       additionalInfo: {
         description: entity.additionalInfo ? entity.additionalInfo.description : ''
       }
@@ -172,12 +172,11 @@ export class OtaUpdateComponent extends EntityComponent<OtaPackage> implements O
   }
 
   prepareFormValue(formValue: any): any {
-    if (formValue.resource === 'url') {
+    if (formValue.isURL) {
       delete formValue.file;
     } else {
       delete formValue.url;
     }
-    delete formValue.resource;
     delete formValue.generateChecksum;
     return super.prepareFormValue(formValue);
   }
diff --git a/ui-ngx/src/app/shared/models/ota-package.models.ts b/ui-ngx/src/app/shared/models/ota-package.models.ts
index f8b99f317f..a27330235a 100644
--- a/ui-ngx/src/app/shared/models/ota-package.models.ts
+++ b/ui-ngx/src/app/shared/models/ota-package.models.ts
@@ -99,6 +99,7 @@ export interface OtaPackageInfo extends BaseData<OtaPackageId> {
   contentType: string;
   dataSize?: number;
   additionalInfo?: any;
+  isURL?: boolean;
 }
 
 export interface OtaPackage extends OtaPackageInfo {