diff --git a/requirements-ci.txt b/requirements-ci.txt
index 4f507285b..fc17b123a 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -19,3 +19,4 @@ kaldialign==0.2
 sentencepiece==0.1.96
 tensorboard==2.8.0
 typeguard==2.13.3
+multi_quantization
diff --git a/requirements.txt b/requirements.txt
index 4eaa86a67..90b1dac69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ kaldialign
 sentencepiece>=0.1.96
 tensorboard
 typeguard
+multi_quantization