diff --git a/pyproject.toml b/pyproject.toml
index 6518dc1ea..e888b9fef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ dependencies = [
     "kaitaistruct>=0.10,<=0.10",
     "ldap3>=2.8,<=2.9.1",
     "mitmproxy_rs>=0.9.1,<0.10",  # relaxed upper bound here: we control this
-    "msgpack>=1.0.0,<=1.0.8",
+    "msgpack>=1.0.0,<=1.1.0",
     "passlib>=1.6.5,<=1.7.4",
     "protobuf>=5.27.2,<=5.28.0",
     "pydivert>=2.0.3,<=2.1.0; sys_platform == 'win32'",