diff --git a/models.py b/models.py
index 773e31a4..6982231c 100755
--- a/models.py
+++ b/models.py
@@ -88,7 +88,7 @@ def create_modules(module_defs, img_size, arc):
                 elif arc == 'Fdefault':  # Focal default no pw (28 cls, 21 obj, no pw)
                     b = [-2.1, -1.8]
                 elif arc == 'uFBCE':  # unified FocalBCE (5120 obj, 80 classes)
-                    b = [0, -3.5]
+                    b = [0, -6.5]
                 elif arc == 'uFCE':  # unified FocalCE (64 cls, 1 background + 80 classes)
                     b = [7, -0.1]
 
diff --git a/utils/datasets.py b/utils/datasets.py
index abf95658..166435b5 100755
--- a/utils/datasets.py
+++ b/utils/datasets.py
@@ -146,6 +146,7 @@ class LoadWebcam:  # for inference
     def __next__(self):
         self.count += 1
         if cv2.waitKey(1) == 27:  # esc to quit
+            self.cap.release()
             cv2.destroyAllWindows()
             raise StopIteration