diff --git a/..gitignore.~undo-tree~ b/..gitignore.~undo-tree~
new file mode 100644
index 0000000..668594b
--- /dev/null
+++ b/..gitignore.~undo-tree~
@@ -0,0 +1,5 @@
+(undo-tree-save-format-version . 1)
+"c3532e7193831ff41df678e9bbd90906765b1374"
+[nil nil nil nil (25202 59981 613431 521000) 0 nil]
+([nil current ((10 . 20) (9 . 10) (t 25186 11860 131806 328000)) nil (25202 59981 613425 708000) 0 nil])
+nil
diff --git a/.gitignore b/.gitignore
index ea8c4bf..fba7613 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /target
+
+Cargo.lock
\ No newline at end of file