diff --git a/requirements.txt b/requirements.txt
index 6b106642..9dbe1428 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ librosa
 more_itertools
 scipy==1.3.2
 scikit-learn
-pyyaml
+pyyaml==5.4.1
 pydub
 deepspeech
 nltk