diff --git a/setup.py b/setup.py
index 49f509d9f..fa53b5d7e 100644
--- a/setup.py
+++ b/setup.py
@@ -112,7 +112,7 @@ base = [
     "ToJyutping",
     "typeguard",
     "webrtcvad",
-    "yacs",
+    "yacs>=0.1.8",
     "zhon",
 ]