diff --git a/includes/core/class-validation.php b/includes/core/class-validation.php
index cd49d001..5a80a9db 100644
--- a/includes/core/class-validation.php
+++ b/includes/core/class-validation.php
@@ -73,7 +73,11 @@ if ( ! class_exists( 'um\core\Validation' ) ) {
 				}
 
 				//validation of correct values from options in wp-admin
-				$stripslashes = stripslashes( $value );
+				$stripslashes = $value;
+				if( is_string( $value ) ){
+					$stripslashes = stripslashes( $value );
+				}
+
 				if ( in_array( $fields[ $key ]['type'], array( 'select' ) ) &&
 				     ! empty( $stripslashes ) && ! empty( $fields[ $key ]['options'] ) &&
 				     ! in_array( $stripslashes, array_map( 'trim', $fields[ $key ]['options'] ) ) ) {