diff --git a/pyproject.toml b/pyproject.toml
index aa03506b..8112d6bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,7 +88,7 @@ dependencies = [
     "toml>=0.10.2",
     
     # Monitoring and logging
-    "prometheus-client>=0.19.0",
+    "prometheus-client>=0.25.0",
     "structlog>=23.2.0",
     "psutil>=5.9.0",
     
diff --git a/requirements.txt b/requirements.txt
index bdc9ff0a..aa153195 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,5 +35,5 @@ opencv-python>=4.7.0
 scikit-learn>=1.2.0
 
 # Monitoring dependencies
-prometheus-client>=0.16.0
+prometheus-client>=0.25.0
 psutil>=5.9.0  # system metrics — imported by health.py / metrics.py / status.py / monitoring.py