diff --git a/data/cdn.txt b/data/cdn.txt
index 45cc0f4..e973049 100644
--- a/data/cdn.txt
+++ b/data/cdn.txt
@@ -2218,3 +2218,51 @@
 117.27.241.218
 112.65.92.116
 52.114.128.43
+183.66.109.254
+60.28.100.248
+111.161.122.240
+121.31.28.101
+222.218.87.252
+113.16.212.251
+58.18.254.253
+124.225.107.254
+14.204.186.174
+14.204.185.254
+14.204.185.123
+220.165.142.253
+42.123.108.8
+42.123.107.43
+120.241.66.115
+112.90.135.229
+183.56.172.113
+27.155.108.102
+27.155.108.93
+61.132.238.115
+113.194.59.199
+218.64.94.181
+122.191.168.109
+42.49.185.169
+42.49.185.170
+175.154.187.252
+118.123.233.254
+118.123.237.245
+123.138.157.122
+113.142.80.223
+117.23.2.252
+218.26.75.236
+218.26.75.206
+183.131.124.249
+36.25.241.251
+153.99.235.91
+221.230.143.254
+120.221.24.14
+218.58.205.182
+182.34.127.253
+150.138.214.124
+61.54.7.192
+115.54.16.245
+218.12.228.246
+121.22.247.254
+124.236.28.230
+218.60.185.251
+42.101.72.9
diff --git a/py12306/helpers/OCR.py b/py12306/helpers/OCR.py
index 0345d0b..a20f6bd 100644
--- a/py12306/helpers/OCR.py
+++ b/py12306/helpers/OCR.py
@@ -58,7 +58,7 @@ class OCR:
         data = {
             'img': img
         }
-        response = self.session.post(API_FREE_CODE_QCR_API, data=data)
+        response = self.session.post(API_FREE_CODE_QCR_API, data=data, timeout=30)
         result = response.json()
         if result.get('msg') == 'success':
             pos = result.get('result')