diff --git a/.gitignore b/.gitignore
index 1b763b1bae0d0061ad60e8847714df98e68f7eac..30dfc5657512cd927f6e5bf4c31656e5594d6f29 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,6 @@
 CHANGELOG.md
+hanzi-data
+templates
+LICENSE
+NOTICE
+out
diff --git a/content/Bijection-from-Images/.apkg-spec.yml b/content/Bijection-from-Images/.apkg-spec.yaml
similarity index 91%
rename from content/Bijection-from-Images/.apkg-spec.yml
rename to content/Bijection-from-Images/.apkg-spec.yaml
index 77281978a4f67a4aecac4b403ae290d54be6870b..c6b586804d7e74d1725235df253bde4a6099549b 100644
--- a/content/Bijection-from-Images/.apkg-spec.yml
+++ b/content/Bijection-from-Images/.apkg-spec.yaml
@@ -1,4 +1,4 @@
-content_version: 2.0.3
+content_version: 1.0.0
 
 templates:
 - bijective