diff --git a/spec/pattern.yaml b/spec/pattern.yaml
index 0614216..0737295 100644
--- a/spec/pattern.yaml
+++ b/spec/pattern.yaml
@@ -97,6 +97,11 @@ components:
                 $ref: '#/components/schemas/pointID'
             end:
                 $ref: '#/components/schemas/pointID'
+        style:
+          type: object
+          properties:
+            thickness:
+              type: number
     pointID:
       oneOf:
         - type: integer