diff --git a/requirements.lock.txt b/requirements.lock.txt
index 001310c..37b2fe4 100644
--- a/requirements.lock.txt
+++ b/requirements.lock.txt
@@ -6,7 +6,7 @@ hypothesis==6.156.1
 matplotlib-inline==0.2.1
 matplotlib==3.10.7
 numpy==2.3.4
-paho-mqtt==1.6.1
+paho-mqtt==2.1.0
 pandas==2.3.3
 pillow==12.3.0
 pvlib==0.15.2
diff --git a/requirements.txt b/requirements.txt
index c367f64..10661c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ shapely>=2.0
 scipy>=1.10
 
 # v2.5: MQTT log subscriber (tools/log_subscriber.py)
-paho-mqtt>=2.0
+paho-mqtt>=2.1.0
 
 # Optional: 3D model + exports + visualizations
 # cadquery>=2.4