diff --git a/lib/manager/html/update.spec.ts b/lib/manager/html/update.spec.ts
index d3912ec548bc1e862e4571dc35ade4881dc49fdf..d9cdbb5f85f859f347a7a07c5db866eaf80740cb 100644
--- a/lib/manager/html/update.spec.ts
+++ b/lib/manager/html/update.spec.ts
@@ -6,7 +6,7 @@ import _got from '../../util/got';
 const got: jest.Mock<any> = _got as any;
 jest.mock('../../util/got');
 
-const content = readFileSync(
+const fileContent = readFileSync(
   resolve(__dirname, `./__fixtures__/sample.html`),
   'utf8'
 );
@@ -22,15 +22,15 @@ describe('manager/html/update', () => {
   });
   it('updates dependency', async () => {
     got.mockResolvedValueOnce({ body: axiosJson });
-    const { deps } = extractPackageFile(content);
+    const { deps } = extractPackageFile(fileContent);
     const dep = deps.pop();
     const upgrade = {
       ...dep,
       newValue: '0.19.2',
     };
     const { currentValue, newValue } = upgrade;
-    const newFileContent = await updateDependency(content, upgrade);
-    const cmpContent = content
+    const newFileContent = await updateDependency({ fileContent, upgrade });
+    const cmpContent = fileContent
       .replace(currentValue, newValue)
       .replace(
         'sha256-mpnrJ5DpEZZkwkE1ZgkEQQJW/46CSEh/STrZKOB/qoM=',
@@ -39,43 +39,49 @@ describe('manager/html/update', () => {
     expect(newFileContent).toEqual(cmpContent);
   });
   it('returns same string for already updated dependency', async () => {
-    const { deps } = extractPackageFile(content);
+    const { deps } = extractPackageFile(fileContent);
     const dep = deps.pop();
     const upgrade = {
       ...dep,
       newValue: '9.9.999',
     };
     const { currentValue } = upgrade;
-    const alreadyUpdated = content
+    const alreadyUpdated = fileContent
       .replace(currentValue, '9.9.999')
       .replace(
         'sha256-mpnrJ5DpEZZkwkE1ZgkEQQJW/46CSEh/STrZKOB/qoM=',
         'sha256-T/f7Sju1ZfNNfBh7skWn0idlCBcI3RwdLSS4/I7NQKQ='
       );
-    const newFileContent = await updateDependency(alreadyUpdated, upgrade);
+    const newFileContent = await updateDependency({
+      fileContent: alreadyUpdated,
+      upgrade,
+    });
     expect(newFileContent).toBe(alreadyUpdated);
   });
   it('returns null if content has changed', async () => {
-    const { deps } = extractPackageFile(content);
+    const { deps } = extractPackageFile(fileContent);
     const dep = deps.pop();
     const upgrade = {
       ...dep,
       newValue: '9.9.999',
     };
     const { currentValue } = upgrade;
-    const alreadyUpdated = content.replace(currentValue, '2020.1');
-    const newFileContent = await updateDependency(alreadyUpdated, upgrade);
+    const alreadyUpdated = fileContent.replace(currentValue, '2020.1');
+    const newFileContent = await updateDependency({
+      fileContent: alreadyUpdated,
+      upgrade,
+    });
     expect(newFileContent).toBeNull();
   });
   it('returns null if hash is not found', async () => {
     got.mockResolvedValueOnce({ body: axiosJson });
-    const { deps } = extractPackageFile(content);
+    const { deps } = extractPackageFile(fileContent);
     const dep = deps.pop();
     const upgrade = {
       ...dep,
       newValue: '9.9.999',
     };
-    const newFileContent = await updateDependency(content, upgrade);
+    const newFileContent = await updateDependency({ fileContent, upgrade });
     expect(newFileContent).toBeNull();
   });
 });
diff --git a/lib/manager/html/update.ts b/lib/manager/html/update.ts
index 12d15a3dabbdbebc849f85b938f7615c7d31d926..c2ace1d3f107233ec3a4821782a2189dcc6b05ec 100644
--- a/lib/manager/html/update.ts
+++ b/lib/manager/html/update.ts
@@ -1,5 +1,5 @@
 import { logger } from '../../logger';
-import { PackageDependency, Upgrade } from '../common';
+import { PackageDependency, UpdateDependencyConfig } from '../common';
 import { extractDep } from './extract';
 import * as cdnjs from '../../datasource/cdnjs';
 import got from '../../util/got';
@@ -37,10 +37,10 @@ async function fetchNewHash(
   return result;
 }
 
-export async function updateDependency(
-  fileContent: string,
-  upgrade: Upgrade
-): Promise<string | null> {
+export async function updateDependency({
+  fileContent,
+  upgrade,
+}: UpdateDependencyConfig): Promise<string> {
   const { currentValue, newValue, managerData } = upgrade;
   const { tagPosition, tagLength } = managerData;
   const leftPart = fileContent.slice(0, tagPosition);