diff --git a/spec/.gitignore b/spec/.gitignore
index d5cb26347..9f8d45431 100644
--- a/spec/.gitignore
+++ b/spec/.gitignore
@@ -1,3 +1,6 @@
 bundle/*
 spec.pdf
 venv/*
+
+# Tinymist lockfile
+tinymist.lock