diff --git a/sources b/sources
index 0cb7ddc..5e68458 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA1 (pytz-2017.2.zip) = c2d0024d4a6bd649290813f0a57d849accf82fa9
+SHA512 (pytz-2017.2.zip) = d67d64a64b4c21e0bd41da56020fc7b016aec9da7f3243f79b65704119f70b8a9cd4f5f905631b6761e06ecef93830e5e479e16c7b1611ac70e0cd2b39d5b916