diff --git a/.gitignore b/.gitignore
index e69de29..55be9fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+/hashdiff-0.3.2.gem
diff --git a/sources b/sources
index e69de29..58e09e7 100644
--- a/sources
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (hashdiff-0.3.2.gem) = eaf7554ee3336ef5873272320b23d71c7b30fbf9dc37a09ce84af5eec3d83b82dd345017a45bb9ca6fa57882d8a4bda42ec650ae15ce3c14eb0ad81b096a02d9