diff --git a/packages/service-worker/config/src/generator.ts b/packages/service-worker/config/src/generator.ts
index cabd67f491..01e430c758 100644
--- a/packages/service-worker/config/src/generator.ts
+++ b/packages/service-worker/config/src/generator.ts
@@ -46,7 +46,7 @@ export class Generator {
       plainFiles.forEach(file => seenMap.add(file));
 
       // Add the hashes.
-      await plainFiles.reduce(async(previous, file) => {
+      await[...versionedFiles, ...plainFiles].reduce(async(previous, file) => {
         await previous;
         const hash = await this.fs.hash(file);
         hashTable[joinUrls(this.baseHref, file)] = hash;
diff --git a/packages/service-worker/config/test/generator_spec.ts b/packages/service-worker/config/test/generator_spec.ts
index b03dd62cda..2511226c61 100644
--- a/packages/service-worker/config/test/generator_spec.ts
+++ b/packages/service-worker/config/test/generator_spec.ts
@@ -14,6 +14,7 @@ export function main() {
     it('generates a correct config', (done: DoneFn) => {
       const fs = new MockFilesystem({
         '/index.html': 'This is a test',
+        '/test.txt': 'Another test',
         '/foo/test.html': 'Another test',
         '/ignored/x.html': 'should be ignored',
       });
@@ -30,7 +31,9 @@ export function main() {
               '/**/*.html', '!/ignored/**',
               //                '/*.html',
             ],
-            versionedFiles: [],
+            versionedFiles: [
+              '/**/*.txt',
+            ],
             urls: [
               '/absolute/**',
               '/some/url?with+escaped+chars',
@@ -62,7 +65,11 @@ export function main() {
                'name': 'test',
                'installMode': 'prefetch',
                'updateMode': 'prefetch',
-               'urls': ['/test/index.html', '/test/foo/test.html'],
+               'urls': [
+                 '/test/index.html',
+                 '/test/foo/test.html',
+                 '/test/test.txt',
+               ],
                'patterns': [
                  '\\/absolute\\/.*',
                  '\\/some\\/url\\?with\\+escaped\\+chars',
@@ -79,6 +86,7 @@ export function main() {
                'version': 1,
              }],
              'hashTable': {
+               '/test/test.txt': '18f6f8eb7b1c23d2bb61bff028b83d867a9e4643',
                '/test/index.html': 'a54d88e06612d820bc3be72877c74f257b561b19',
                '/test/foo/test.html': '18f6f8eb7b1c23d2bb61bff028b83d867a9e4643'
              }