From 23fe80a5fc2a8ac9865fa426f60a138657085662 Mon Sep 17 00:00:00 2001
From: Joseph Lynch <josephl@netflix.com>
Date: Mon, 1 Mar 2021 07:39:52 -0800
Subject: [PATCH] Workaround for samuelcolvin/pydantic#1880

---
 service_capacity_modeling/interface.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/service_capacity_modeling/interface.py b/service_capacity_modeling/interface.py
index f4d974c..1dd5e7b 100644
--- a/service_capacity_modeling/interface.py
+++ b/service_capacity_modeling/interface.py
@@ -41,6 +41,7 @@ class Interval(BaseModel):
 
     class Config:
         allow_mutation = False
+        frozen = True
 
     @property
     def can_simulate(self):