diff --git a/pyproject.toml b/pyproject.toml
index 0ce5d8f..b4b4b4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ classifiers = [
 dependencies = [
     "certifi (>=2026.10.19)",
     "pika (>=1.4.4,<1.5.0)",
-    "python_json_logger (>=3.3.0,<3.4.0)",
+    "python_json_logger (>=4.2.0,<4.3.0)",
     "PyYAML (>=6.0,<6.1)",
     "pydantic (>=2.13.3,<2.14.0)",
     "pydantic-settings (>=2.15.0,<2.16.0)",