diff --git a/.gitignore b/.gitignore
index e69de29..9b494c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+/rmp-0.8.7.crate
diff --git a/rmp-0.8.7.crate b/rmp-0.8.7.crate
deleted file mode 100644
index c7f2ed1..0000000
Binary files a/rmp-0.8.7.crate and /dev/null differ
diff --git a/sources b/sources
index e69de29..4d354d8 100644
--- a/sources
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (rmp-0.8.7.crate) = e679e45d6864c7a31835941ed919aea27a591bbd0a7902b4b125556cce25d2e840c7b1dbfcc1708af71680011d33064b157b36f7b9eb8c7cd3ca1448d88ce8bb