diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 49a47fc7..057d1a64 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,7 +25,7 @@ repos:
     files: \.py$
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: 'v1.11.1'
+  rev: 'v1.19.1'
   hooks:
   - id: mypy
     files: (src/gh|tests|invokes\.py)
diff --git a/environment.yml b/environment.yml
index 193c4dcf..63236d2d 100644
Binary files a/environment.yml and b/environment.yml differ
diff --git a/src/gh/diffCheck/diffCheck/df_geometries.py b/src/gh/diffCheck/diffCheck/df_geometries.py
index 73085aa1..99d4c531 100644
--- a/src/gh/diffCheck/diffCheck/df_geometries.py
+++ b/src/gh/diffCheck/diffCheck/df_geometries.py
@@ -579,12 +579,12 @@ def compute_joint_angles(self) -> typing.List[float]:
                 angle = rg.Vector3d.VectorAngle(self.axis.Direction, joint_normal)
                 angle_degree = Rhino.RhinoMath.ToDegrees(angle)
                 jointfaces_angles.append(angle_degree)
-                angle_degree = int(angle_degree)
+                angle_degree = float(angle_degree)
 
-                if angle_degree > 90:
-                    angle_degree = 180 - angle_degree
-                if angle_degree >= 89 and angle_degree <= 90:
-                    angle_degree = -1
+                if angle_degree > 90.0:
+                    angle_degree = 180.0 - angle_degree
+                if angle_degree >= 89.0 and angle_degree <= 90.0:
+                    angle_degree = -1.0
 
                 jointface_angles.append(angle_degree)
         return jointface_angles