diff --git a/CHANGELOG b/CHANGELOG
index 2b7d5808e7eb6b78663a9fc3075c102de6b92516..e651aece696181d1d96f39b3efc6e905e654ba22 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -13,6 +13,7 @@ v 8.4.0 (unreleased)
   - Revert back upvote and downvote button to the issue and MR pages
   - Swap position of Assignee and Author selector on Issuables (Zeger-Jan van de Weg)
   - Fix version check image in Safari
+  - Fix API project lookups when querying with a namespace with dots (Stan Hu)
 
 v 8.3.3 (unreleased)
   - Fix project transfer e-mail sending incorrect paths in e-mail notification (Stan Hu)
diff --git a/lib/api/projects.rb b/lib/api/projects.rb
index a9e0960872a08cb1b455a448b8458364acd95e8d..0781236cf6daa07fd0546f58f8f9620d2c22bf06 100644
--- a/lib/api/projects.rb
+++ b/lib/api/projects.rb
@@ -3,7 +3,7 @@ module API
   class Projects < Grape::API
     before { authenticate! }
 
-    resource :projects do
+    resource :projects, requirements: { id: /[^\/]+/ } do
       helpers do
         def map_public_to_visibility_level(attrs)
           publik = attrs.delete(:public)
diff --git a/spec/requests/api/projects_spec.rb b/spec/requests/api/projects_spec.rb
index 7f0f9454b1006a193e5f10470e50857973af4a4b..ab2530859eaaf937efc6898eeb7224d40a9bc69a 100644
--- a/spec/requests/api/projects_spec.rb
+++ b/spec/requests/api/projects_spec.rb
@@ -382,6 +382,15 @@ describe API::API, api: true  do
       expect(response.status).to eq(404)
     end
 
+    it 'should handle users with dots' do
+      dot_user = create(:user, username: 'dot.user')
+      project = create(:project, creator_id: dot_user.id, namespace: dot_user.namespace)
+
+      get api("/projects/#{dot_user.namespace.name}%2F#{project.path}", dot_user)
+      expect(response.status).to eq(200)
+      expect(json_response['name']).to eq(project.name)
+    end
+
     describe 'permissions' do
       context 'all projects' do
         it 'Contains permission information' do