diff --git a/pyproject.toml b/pyproject.toml
index a3692b7..9b715f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -80,7 +80,7 @@ dev-pytest = [
   "pytest-mock == 3.15.1",
   "pytest-asyncio == 1.3.0",
   "async-solipsism == 0.8",
-  "hypothesis == 6.148.7",
+  "hypothesis == 6.148.9",
   "frequenz-client-base",
 ]
 dev = [