diff --git a/cd/project.py b/cd/project.py
index bdb2426..c4e79d4 100644
--- a/cd/project.py
+++ b/cd/project.py
@@ -1,3 +1,4 @@
+"""CI project."""
 from __future__ import annotations
 
 from pathlib import Path
diff --git a/cd/projects.py b/cd/projects.py
index a1ca31f..f536499 100644
--- a/cd/projects.py
+++ b/cd/projects.py
@@ -1,3 +1,4 @@
+"""CI projects."""
 from __future__ import annotations
 
 from pathlib import Path