diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index af77e93..ea8bfd8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,7 +4,7 @@ name: CI
 
 # Controls when the action will run. Triggers the workflow on push or pull request
 # events but only for the master branch
-on: [push]
+on: [push, pull_request]
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
index 0000000..07e8ea4
--- /dev/null
+++ b/CODEOWNERS
@@ -0,0 +1,3 @@
+## This defines the code owner of the repository
+
+@lyonlai @alecthomas @jvmakine @juliaogris