diff --git a/lib/manager/docker/package.js b/lib/manager/docker/package.js
index ab578effaa90d8f2ba6c038e6a94a5bdd35096e0..c4a3a9f274a079ee3a75bd5800846683f3355612 100644
--- a/lib/manager/docker/package.js
+++ b/lib/manager/docker/package.js
@@ -64,7 +64,7 @@ async function getPackageUpdates(config) {
         { currentDepTag },
         'Docker tag is not valid semver - skipping'
       );
-      return upgrades;
+      return upgrades.map(upgrade => ({ ...upgrade, isRange: true }));
     }
     const currentMajor = semver.major(padRange(tagVersion));
     const currentlyStable = isStable(tagVersion, unstablePattern);
diff --git a/test/manager/docker/package.spec.js b/test/manager/docker/package.spec.js
index 680277f9e371b2943571d31d9881c8aa31694d53..f8bd76e5d7855efc3ee0207c4bd8605af45d68a8 100644
--- a/test/manager/docker/package.spec.js
+++ b/test/manager/docker/package.spec.js
@@ -65,6 +65,7 @@ describe('lib/workers/package/docker', () => {
     });
     it('returns a pin', async () => {
       delete config.currentDigest;
+      config.currentTag = 'some-text-tag';
       dockerApi.getDigest.mockReturnValueOnce('sha256:1234567890');
       const res = await docker.getPackageUpdates(config);
       expect(res).toHaveLength(1);