diff --git a/telemetry/ui/scripts/token_costs.py b/telemetry/ui/scripts/token_costs.py
index 2eb03769e..7ef1ba9b4 100644
--- a/telemetry/ui/scripts/token_costs.py
+++ b/telemetry/ui/scripts/token_costs.py
@@ -21,7 +21,8 @@
 import requests
 import json
 
-response = requests.get(url)
+response = requests.get(url, timeout=30)
+response.raise_for_status()
 data = response.json()
 
 keys_wanted = ["input_cost_per_token", "output_cost_per_token", "max_tokens", "max_input_tokens", "max_output_tokens"]
@@ -34,5 +35,5 @@
             del data[model_entry][key]
 
 # save the data
-with open("model_costs.json", "w") as f:
+with open("model_costs.json", "w", encoding="utf-8") as f:
     json.dump(data, f)