diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..78f47b04
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+util/data filter=lfs diff=lfs merge=lfs -text
diff --git a/background.html b/extension/background.html
similarity index 100%
rename from background.html
rename to extension/background.html
diff --git a/content.js b/extension/content.js
similarity index 100%
rename from content.js
rename to extension/content.js
diff --git a/icon.png b/extension/icon.png
similarity index 100%
rename from icon.png
rename to extension/icon.png
diff --git a/jp/dictionary.js b/extension/jp/dictionary.js
similarity index 100%
rename from jp/dictionary.js
rename to extension/jp/dictionary.js
diff --git a/jp/translator.js b/extension/jp/translator.js
similarity index 100%
rename from jp/translator.js
rename to extension/jp/translator.js
diff --git a/lib/jquery-2.2.2.min.js b/extension/lib/jquery-2.2.2.min.js
similarity index 100%
rename from lib/jquery-2.2.2.min.js
rename to extension/lib/jquery-2.2.2.min.js
diff --git a/manifest.json b/extension/manifest.json
similarity index 100%
rename from manifest.json
rename to extension/manifest.json