diff --git a/releasenotes/notes/oslo.config-f67bf37ea35dd7fe.yaml b/releasenotes/notes/oslo.config-f67bf37ea35dd7fe.yaml
new file mode 100644
index 000000000..d81fe1e61
--- /dev/null
+++ b/releasenotes/notes/oslo.config-f67bf37ea35dd7fe.yaml
@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    An implicit dependency on ``oslo.config`` is now explicit.
diff --git a/requirements.txt b/requirements.txt
index 5e76b37fd..4adff2f02 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,7 @@ dogpile.cache>=0.6.2 # BSD
 jsonschema>=2.6.0 # MIT
 keystoneauth1>=3.4.0 # Apache-2.0
 osc-lib>=1.10.0 # Apache-2.0
+oslo.config>=5.2.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0