diff --git a/sensors/box/sensor.json b/sensors/box/sensor.json
index 4617b9c..1349dd4 100644
--- a/sensors/box/sensor.json
+++ b/sensors/box/sensor.json
@@ -42,8 +42,8 @@
   },
   "contact": {
     "min_contour_area": 3000,
-    "flow_threshold":5,
-    "div_threshold":0.05,
+    "flow_threshold":0.2,
+    "div_threshold":0.007,
     "expansion_threshold": 0.01,
     "kernel_size": [5,5],
     "denoise_sigma": 12
diff --git a/sensors/finger/sensor.json b/sensors/finger/sensor.json
index 03960b3..2d34f4e 100644
--- a/sensors/finger/sensor.json
+++ b/sensors/finger/sensor.json
@@ -34,7 +34,7 @@
   "contact": {
     "min_contour_area": 3000,
     "flow_threshold": 0.2,
-    "div_threshold": 0.022,
+    "div_threshold": 0.007,
     "expansion_threshold": 0.01,
     "kernel_size": [5, 5],
     "denoise_sigma": 12
diff --git a/sensors/mini/sensor.json b/sensors/mini/sensor.json
index 4617b9c..1349dd4 100644
--- a/sensors/mini/sensor.json
+++ b/sensors/mini/sensor.json
@@ -42,8 +42,8 @@
   },
   "contact": {
     "min_contour_area": 3000,
-    "flow_threshold":5,
-    "div_threshold":0.05,
+    "flow_threshold":0.2,
+    "div_threshold":0.007,
     "expansion_threshold": 0.01,
     "kernel_size": [5,5],
     "denoise_sigma": 12