diff --git a/config/routes/group.rb b/config/routes/group.rb
index 33143f0dfa246db98010c1fd5473d8c830910c7b..06b464d79c8760910581d0fce14a2639b48b5ba3 100644
--- a/config/routes/group.rb
+++ b/config/routes/group.rb
@@ -1,7 +1,10 @@
 require 'constraints/group_url_constrainer'
 
 constraints(GroupUrlConstrainer.new) do
-  scope(path: ':id', as: :group, controller: :groups) do
+  scope(path: ':id',
+        as: :group,
+        constraints: { id: /[a-zA-Z.0-9_\-]+(?<!\.atom)/ },
+        controller: :groups) do
     get '/', action: :show
     patch '/', action: :update
     put '/', action: :update
diff --git a/spec/routing/routing_spec.rb b/spec/routing/routing_spec.rb
index 0ee1c811dfb026c38f705d344b201dbc6dea0589..488dc1a63b0d0a1eb6bd5d0d3d5cbb91c7ebccfe 100644
--- a/spec/routing/routing_spec.rb
+++ b/spec/routing/routing_spec.rb
@@ -270,6 +270,12 @@ describe "Groups", "routing" do
 
     expect(get('/1')).to route_to('groups#show', id: '1')
   end
+
+  it "also display group#show with dot in the path" do
+    allow(Group).to receive(:find_by_path).and_return(true)
+
+    expect(get('/group.with.dot')).to route_to('groups#show', id: 'group.with.dot')
+  end
 end
 
 describe HealthCheckController, 'routing' do