diff --git a/sources b/sources
index cb7f169..80a7283 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA1 (attrs-17.4.0.tar.gz) = 7487af781f942e370977bb91feedeb4c98edfd07
+SHA512 (attrs-17.4.0.tar.gz) = 14a512009cefbadc66972380f3beeb80e28daebeef467838c3506fd33a65e555666434a2d8f7294291b431e8b787aea370e267045f30a2253463e79d0e6caa3a