diff --git a/tts/pyproject.toml b/tts/pyproject.toml
index e209660..ffff9e2 100644
--- a/tts/pyproject.toml
+++ b/tts/pyproject.toml
@@ -1,8 +1,8 @@
 [project]
 name = "tts"
 version = "0.1.0"
-requires-python = ">=3.12"
+requires-python = "==3.12.*"
 dependencies = [
-    "kokoro>=0.9.4",
-    "soundfile>=0.13.1",
+    "kokoro==0.9.4",
+    "soundfile==0.13.1",
 ]