diff --git a/app/serializers/commit_entity.rb b/app/serializers/commit_entity.rb
index f7eba6fc1e34d8f54a6d1f672340b688c4e66af6..121ca76a16f08132730374b26a887340f7f99d44 100644
--- a/app/serializers/commit_entity.rb
+++ b/app/serializers/commit_entity.rb
@@ -3,6 +3,10 @@ class CommitEntity < API::Entities::RepoCommit
 
   expose :author, using: UserEntity
 
+  expose :author_gravatar_url do |commit|
+    GravatarService.new.execute(commit.author_email)
+  end
+
   expose :commit_url do |commit|
     namespace_project_tree_url(
       request.project.namespace,
diff --git a/spec/serializers/commit_entity_spec.rb b/spec/serializers/commit_entity_spec.rb
index 628e35c9a286a7b889753fadad4f773571d84635..5b2a6c6c294d9e60c8cc3bbc5c9ff8d7237ec7d3 100644
--- a/spec/serializers/commit_entity_spec.rb
+++ b/spec/serializers/commit_entity_spec.rb
@@ -41,4 +41,8 @@ describe CommitEntity do
 
     subject
   end
+
+  it 'exposes gravatar url that belongs to author' do
+    expect(subject.fetch(:author_gravatar_url)).to match /gravatar/
+  end
 end