diff --git a/requirements.txt b/requirements.txt
index ab828503..fde48978 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,5 +19,6 @@ numba==0.52
 umap-learn==0.4.6
 anyascii
 coqpit
-mecab-python3
-unidic-lite
+# japanese g2p deps
+mecab-python3==1.0.3
+unidic-lite==1.0.8