diff --git a/requirements.txt b/requirements.txt
index fe9c18f..280d9d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,3 +33,4 @@ ko_pron
 opencc; sys_platform != 'linux'
 opencc==1.1.1; sys_platform == 'linux'
 python_mecab_ko; sys_platform != 'win32'
+fastapi<0.112.2