diff --git a/lib/manager/gomod/update.js b/lib/manager/gomod/update.js
index ceac15602930be0b82ef5064ae549d1f2f14d25f..912a837a6b8c1a80bfe5a6ec1cd5a65fe0ec5425 100644
--- a/lib/manager/gomod/update.js
+++ b/lib/manager/gomod/update.js
@@ -75,6 +75,9 @@ function updateDependency(currentFileContent, upgrade) {
         }
       }
     }
+    if (lineToChange.endsWith('+incompatible')) {
+      newLine += '+incompatible';
+    }
     if (newLine === lineToChange) {
       logger.debug('No changes necessary');
       return currentFileContent;
diff --git a/test/_fixtures/go/1/go.mod b/test/_fixtures/go/1/go.mod
index 61e316ad7ad40f49dc3e7dba83a2b196d82fb4b3..a3e27f4b42b9e7753b6c285aba8dc384ab88fe87 100644
--- a/test/_fixtures/go/1/go.mod
+++ b/test/_fixtures/go/1/go.mod
@@ -6,5 +6,6 @@ require github.com/davecgh/go-spew v1.0.0
 require golang.org/x/foo v1.0.0
 require github.com/rarkins/foo abcdef1
 require gopkg.in/russross/blackfriday.v1 v1.0.0
+require github.com/Azure/azure-sdk-for-go v25.1.0+incompatible
 
 replace github.com/pkg/errors => ../errors
diff --git a/test/manager/gomod/__snapshots__/extract.spec.js.snap b/test/manager/gomod/__snapshots__/extract.spec.js.snap
index 72503ec35f12e8dc731087c6dcbe17bdf62e373b..24ffa3972b6188e45c418835882bff6454e28a16 100644
--- a/test/manager/gomod/__snapshots__/extract.spec.js.snap
+++ b/test/manager/gomod/__snapshots__/extract.spec.js.snap
@@ -628,5 +628,13 @@ Array [
     "depType": "require",
     "lineNumber": 7,
   },
+  Object {
+    "currentValue": "v25.1.0+incompatible",
+    "datasource": "go",
+    "depName": "github.com/Azure/azure-sdk-for-go",
+    "depNameShort": "Azure/azure-sdk-for-go",
+    "depType": "require",
+    "lineNumber": 8,
+  },
 ]
 `;
diff --git a/test/manager/gomod/__snapshots__/update.spec.js.snap b/test/manager/gomod/__snapshots__/update.spec.js.snap
index 8528f18f3741a6174d00cf352910e072c21019e6..06173bcf045a37d7e4b60444c82715ee071f7e72 100644
--- a/test/manager/gomod/__snapshots__/update.spec.js.snap
+++ b/test/manager/gomod/__snapshots__/update.spec.js.snap
@@ -9,6 +9,7 @@ require github.com/davecgh/go-spew v1.0.0
 require golang.org/x/foo v1.0.0
 require github.com/rarkins/foo abcdef1
 require gopkg.in/russross/blackfriday.v2 v2.0.0
+require github.com/Azure/azure-sdk-for-go v25.1.0+incompatible
 
 replace github.com/pkg/errors => ../errors
 "
@@ -90,6 +91,7 @@ require github.com/davecgh/go-spew v1.0.0
 require golang.org/x/foo v1.0.0
 require github.com/rarkins/foo abcdef1
 require gopkg.in/russross/blackfriday.v1 v1.0.0
+require github.com/Azure/azure-sdk-for-go v25.1.0+incompatible
 
 replace github.com/pkg/errors => ../errors
 "
diff --git a/test/manager/gomod/extract.spec.js b/test/manager/gomod/extract.spec.js
index 9a912a00968206ffffbe5d32e1badeb2e7e2b136..c6b95cfcea42a694812160d4fb2aa6ba5ad2d683 100644
--- a/test/manager/gomod/extract.spec.js
+++ b/test/manager/gomod/extract.spec.js
@@ -16,7 +16,7 @@ describe('lib/manager/gomod/extract', () => {
     it('extracts single-line requires', () => {
       const res = extractPackageFile(gomod1, config).deps;
       expect(res).toMatchSnapshot();
-      expect(res).toHaveLength(6);
+      expect(res).toHaveLength(7);
       expect(res.filter(e => e.skipReason).length).toBe(1);
     });
     it('extracts multi-line requires', () => {
diff --git a/test/manager/gomod/update.spec.js b/test/manager/gomod/update.spec.js
index 664e16e278381d04631b706c16161054cc42c4c5..1ab1b87c9e96e6dca2fb472af226fa593f519467 100644
--- a/test/manager/gomod/update.spec.js
+++ b/test/manager/gomod/update.spec.js
@@ -176,5 +176,16 @@ describe('manager/gomod/update', () => {
       const res = goUpdate.updateDependency(gomod2, upgrade);
       expect(res).toBe(null);
     });
+    it('handles +incompatible tag', () => {
+      const upgrade = {
+        depName: 'github.com/Azure/azure-sdk-for-go',
+        lineNumber: 8,
+        newValue: 'v26.0.0',
+      };
+      const res = goUpdate.updateDependency(gomod1, upgrade);
+      expect(res).not.toEqual(gomod1);
+      // Assert that the version still contains +incompatible tag.
+      expect(res.includes(upgrade.newValue + '+incompatible')).toBe(true);
+    });
   });
 });