diff --git a/ts/numbering/num.ts b/ts/numbering/num.ts
index 2889b456ef..5a432732cc 100644
--- a/ts/numbering/num.ts
+++ b/ts/numbering/num.ts
@@ -1,24 +1,24 @@
-import {XmlComponent, Attributes, XmlAttributeComponent} from "../docx/xml-components";
+import { Attributes, XmlAttributeComponent, XmlComponent } from "../docx/xml-components";
 
 class AbstractNumId extends XmlComponent {
 
     constructor(value: number) {
         super("w:abstractNumId");
         this.root.push(new Attributes({
-            val: value
+            val: value,
         }));
     }
 }
 
-interface NumAttributesProperties {
+interface INumAttributesProperties {
     numId: number;
 }
 
 class NumAttributes extends XmlAttributeComponent {
 
-    constructor(properties: NumAttributesProperties) {
+    constructor(properties: INumAttributesProperties) {
         super({
-            numId: "w:numId"
+            numId: "w:numId",
         }, properties);
     }
 }
@@ -28,8 +28,8 @@ export class Num extends XmlComponent {
     constructor(numId: number, abstractNumId: number) {
         super("w:num");
         this.root.push(new NumAttributes({
-            numId: numId
+            numId: numId,
         }));
         this.root.push(new AbstractNumId(abstractNumId));
     }
-}
\ No newline at end of file
+}