diff --git a/ui-ngx/src/app/modules/home/components/device/device-credentials.component.html b/ui-ngx/src/app/modules/home/components/device/device-credentials.component.html
index 03e1ae1222..3afadca7b4 100644
--- a/ui-ngx/src/app/modules/home/components/device/device-credentials.component.html
+++ b/ui-ngx/src/app/modules/home/components/device/device-credentials.component.html
@@ -62,7 +62,7 @@
     @case (deviceCredentialsType.X509_CERTIFICATE) {
       <mat-form-field class="mat-block" appearance="outline">
         <mat-label translate>device.certificate-pem-format</mat-label>
-        <textarea matInput formControlName="credentialsValue" cdkTextareaAutosize cdkAutosizeMinRows="1" rows="1" required></textarea>
+        <textarea matInput formControlName="credentialsValue" cdkTextareaAutosize rows="15" required></textarea>
         @if (deviceCredentialsFormGroup.get('credentialsValue').value) {
           <tb-copy-button
             matSuffix