diff --git a/requirements.txt b/requirements.txt
index 3636370..2436c39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 dataclasses-json<1.0
 epitran==1.17
-git+https://github.com/jyapayne/espeak-phonemizer
+git+https://github.com/jyapayne/espeak-phonemizer@master
 gruut>=2.3.0,<3.0
 numpy<2.0
 onnxruntime>=1.6,<2.0