diff --git a/zig-impl/crystal/some-crystal-app/.gitignore b/zig-impl/crystal/some-crystal-app/.gitignore
index 0bb75ea..27aa438 100644
--- a/zig-impl/crystal/some-crystal-app/.gitignore
+++ b/zig-impl/crystal/some-crystal-app/.gitignore
@@ -3,3 +3,5 @@
 /bin/
 /.shards/
 *.dwarf
+old
+shard.lock