diff --git a/.gitignore b/.gitignore
index e69de29..76bff90 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/concurrent-ruby-1.0.0-specs.tar.gz
+/concurrent-ruby-1.0.0.gem
diff --git a/sources b/sources
index e69de29..8159152 100644
--- a/sources
+++ b/sources
@@ -0,0 +1,2 @@
+e0d1bc6c359cec3841fd42d59015305d  concurrent-ruby-1.0.0-specs.tar.gz
+9e38a80ada271fe805d18c0072960cbf  concurrent-ruby-1.0.0.gem