diff --git a/models/avatar.go b/models/avatar.go
index 4f02fe508..b4c078f8c 100644
--- a/models/avatar.go
+++ b/models/avatar.go
@@ -44,7 +44,7 @@ const DefaultAvatarSize = -1
 const DefaultAvatarPixelSize = 28
 
 // AvatarRenderedSizeFactor is the factor by which the default size is increased for finer rendering
-const AvatarRenderedSizeFactor = 2
+const AvatarRenderedSizeFactor = 4
 
 // HashEmail hashes email address to MD5 string.
 // https://en.gravatar.com/site/implement/hash/
diff --git a/modules/repository/commits_test.go b/modules/repository/commits_test.go
index 16677fe8a..ba69a7f97 100644
--- a/modules/repository/commits_test.go
+++ b/modules/repository/commits_test.go
@@ -112,13 +112,13 @@ func TestPushCommits_AvatarLink(t *testing.T) {
 	pushCommits.Len = len(pushCommits.Commits)
 
 	assert.Equal(t,
-		"https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon&s=56",
+		"https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon&s=112",
 		pushCommits.AvatarLink("user2@example.com"))
 
 	assert.Equal(t,
 		"https://secure.gravatar.com/avatar/"+
 			fmt.Sprintf("%x", md5.Sum([]byte("nonexistent@example.com")))+
-			"?d=identicon&s=56",
+			"?d=identicon&s=112",
 		pushCommits.AvatarLink("nonexistent@example.com"))
 }