diff --git a/pyproject.toml b/pyproject.toml
index f27b9c4..592957c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,7 @@ dependencies = [
   "typer[all]",
   "langchain",
   "openai",
+  "pyexpect",
   "tiktoken",
   "black",
   "libcst",