diff --git a/requirements.txt b/requirements.txt
index 76db574..228983f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@
 oslo.concurrency>=3.25.0 # Apache-2.0
 oslo.config>=5.1.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
-stestr>=1.0.0 # Apache-2.0
+stestr<3.0.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 six>=1.10.0 # MIT