diff --git a/python/pyproject.toml b/python/pyproject.toml
index 1228b2a..132c60a 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -15,6 +15,7 @@ dependencies = [
     "pysubs2>=1.7.0",
     "openai>=1.0.0",
     "anthropic>=0.20.0",
+    "soundfile>=0.12.0",
 ]
 
 [project.optional-dependencies]