diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index cf99539..8babbba 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "google-genai==1.9.0",
     "google-cloud-firestore==2.20.0",
     "slowapi==0.1.9",
-    "python-json-logger==3.2.1",
+    "python-json-logger==4.1.0",
     "pyyaml==6.0.2",
     "cachetools==5.5.1"
 ]
diff --git a/backend/requirements.txt b/backend/requirements.txt
index ac09cfa..2b33b24 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -8,6 +8,6 @@ pydantic-settings==2.7.1
 google-genai==1.9.0
 google-cloud-firestore==2.20.0
 slowapi==0.1.9
-python-json-logger==3.2.1
+python-json-logger==4.1.0
 pyyaml==6.0.2
 cachetools==5.5.1