diff --git a/konova/models/geometry.py b/konova/models/geometry.py
index 254ace44..09d81af4 100644
--- a/konova/models/geometry.py
+++ b/konova/models/geometry.py
@@ -364,7 +364,13 @@ class Geometry(BaseResource):
 
         geom_envelope = self.geom.envelope
         diff = geom_envelope - self.geom
-        complexity_factor = 1 - self.geom.area / diff.area
+
+        if diff.area == 0:
+            ratio = 1
+        else:
+            ratio = self.geom.area / diff.area
+
+        complexity_factor = 1 - ratio
         return complexity_factor
 
 
diff --git a/requirements.txt b/requirements.txt
index 908b9680..6d440150 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ pyproj==3.6.1
 python-dateutil==2.8.2
 pytz==2023.3.post1
 PyYAML==6.0.1
-qrcode==7.4.2
+qrcode==7.3.1
 redis==5.1.0a1
 requests==2.31.0
 six==1.16.0