diff --git a/pyproject.toml b/pyproject.toml
index c0431b8f..a948fd3d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,8 +33,8 @@ Repository = "https://opendev.org/openstack/oslo.service"
 
 [project.optional-dependencies]
 threading = [
-    "cotyledon>=2.0.0",
-    "futurist>=3.1.1",
+    "cotyledon>=2.0.0",  # Apache-2.0
+    "futurist>=3.1.1",  # Apache-2.0
 ]
 
 [project.entry-points."oslo.config.opts"]
diff --git a/test-requirements.txt b/test-requirements.txt
index 36179472..2e8bc2b4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,5 +4,5 @@ requests>=2.14.2 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 
 coverage>=4.0 # Apache-2.0
-cotyledon>=2.0.0
-futurist>=3.1.1
+cotyledon>=2.0.0 # Apache-2.0
+futurist>=3.1.1 # Apache-2.0