diff --git a/pyproject.toml b/pyproject.toml
index 4c52d94..e5e5b1f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@
 tomli = { version = "^2.0.1", optional = true }
 jsonnet = { version = "^0.18.0", optional = true }
 kopf = { version = "^1.36.0", optional = true, extras = ["uvloop"] }
-openstacksdk = { version = "^0.103.0", optional = true }
+openstacksdk = { version = "<0.99.0", optional = true }
 certbuilder = { version = "^0.14.2", optional = true }
 "oslo.log" = "^5.0.2"
 "oslo.config" = "^9.0.0"