diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
index 9ad55c194..3c8d4e44b 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
@@ -28,7 +28,7 @@ namespace UniVRM10
         [SerializeField, Range(0, 0.5f), Header("Collision")]
         public float m_jointRadius = 0.02f;
 
-        SpringBoneLogic m_logic;
+        SpringBoneLogic m_logic = null;
 
         public void DrawGizmo(Transform center, Color color)
         {
diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
index c565911a5..407ea4515 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
@@ -141,7 +141,7 @@ namespace UniVRM10
 
                 return true;
             }
-            catch (Exception e)
+            catch (Exception)
             {
                 dst = null;
                 return false;