diff --git a/requirements.txt b/requirements.txt
index e567dfa7..c6889318 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,5 +43,5 @@ typeguard
 unidecode
 visualdl
 webrtcvad
-yacs
+yacs~=0.1.8
 yq
diff --git a/setup.py b/setup.py
index 75b3fe5c..5d4ff80f 100644
--- a/setup.py
+++ b/setup.py
@@ -61,7 +61,7 @@ requirements = {
         "typeguard",
         "visualdl",
         "webrtcvad",
-        "yacs",
+        "yacs~=0.1.8",
     ],
     "develop": [
         "ConfigArgParse",