diff --git a/pyproject.toml b/pyproject.toml
index d31e7e6..f60dbfd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ python = "^3.9"
 protobuf = "5.29.4"
 grpcio = "1.70.0"
 grpcio-tools = "1.70.0"
-jsonpickle = ">=3.0,<4.1"
+jsonpickle = ">=3.0,<4.2"
 pymitter = ">=0.4,<1.1"
 typing-extensions = ">=4.11,<4.14"
 types-protobuf = "6.30.2.20250516"