diff --git a/GITLAB_WORKHORSE_VERSION b/GITLAB_WORKHORSE_VERSION
index 276cbf9e2858c779297bb9f73b34170302949ec4..4a36342fcab700951adb18ae7adc930997f6c3f4 100644
--- a/GITLAB_WORKHORSE_VERSION
+++ b/GITLAB_WORKHORSE_VERSION
@@ -1 +1 @@
-2.3.0
+3.0.0
diff --git a/lib/gitlab/workhorse.rb b/lib/gitlab/workhorse.rb
index 4aef23b6aee1596c86c7b20a373cf213cfe5518c..d4829272c93ee6bee145ea8651cf3657f495c7e1 100644
--- a/lib/gitlab/workhorse.rb
+++ b/lib/gitlab/workhorse.rb
@@ -62,10 +62,21 @@ module Gitlab
       end
 
       def send_git_blob(repository, blob)
-        params = {
-          'RepoPath' => repository.path_to_repo,
-          'BlobId' => blob.id
-        }
+        params = if Gitlab::GitalyClient.feature_enabled?(:project_raw_show)
+                   {
+                     'GitalyServer' => gitaly_server_hash(repository),
+                     'GetBlobRequest' => {
+                       repository: repository.gitaly_repository.to_h,
+                       oid: blob.id,
+                       limit: -1
+                     }
+                   }
+                 else
+                   {
+                     'RepoPath' => repository.path_to_repo,
+                     'BlobId' => blob.id
+                   }
+                 end
 
         [
           SEND_DATA_HEADER,
@@ -192,6 +203,13 @@ module Gitlab
       def encode(hash)
         Base64.urlsafe_encode64(JSON.dump(hash))
       end
+
+      def gitaly_server_hash(repository)
+        {
+          address: Gitlab::GitalyClient.address(repository.project.repository_storage),
+          token: Gitlab::GitalyClient.token(repository.project.repository_storage)
+        }
+      end
     end
   end
 end
diff --git a/spec/lib/gitlab/workhorse_spec.rb b/spec/lib/gitlab/workhorse_spec.rb
index 493ff3bb5fbc3605267f95208267acb7bc096cbb..1bcd0681621c221de9ce1508dfa15525bb38b305 100644
--- a/spec/lib/gitlab/workhorse_spec.rb
+++ b/spec/lib/gitlab/workhorse_spec.rb
@@ -317,4 +317,42 @@ describe Gitlab::Workhorse, lib: true do
       end
     end
   end
+
+  describe '.send_git_blob' do
+    include FakeBlobHelpers
+
+    let(:blob) { fake_blob }
+
+    subject { described_class.send_git_blob(repository, blob) }
+
+    context 'when Gitaly project_raw_show feature is enabled' do
+      it 'sets the header correctly' do
+        key, command, params = decode_workhorse_header(subject)
+
+        expect(key).to eq('Gitlab-Workhorse-Send-Data')
+        expect(command).to eq('git-blob')
+        expect(params).to eq({
+          'GitalyServer' => {
+            address: Gitlab::GitalyClient.address(project.repository_storage),
+            token: Gitlab::GitalyClient.token(project.repository_storage)
+          },
+          'GetBlobRequest' => {
+            repository: repository.gitaly_repository.to_h,
+            oid: blob.id,
+            limit: -1
+          }
+        }.deep_stringify_keys)
+      end
+    end
+
+    context 'when Gitaly project_raw_show feature is disabled', skip_gitaly_mock: true do
+      it 'sets the header correctly' do
+        key, command, params = decode_workhorse_header(subject)
+
+        expect(key).to eq('Gitlab-Workhorse-Send-Data')
+        expect(command).to eq('git-blob')
+        expect(params).to eq('RepoPath' => repository.path_to_repo, 'BlobId' => blob.id)
+      end
+    end
+  end
 end