Updates hydra

diff --git a/hydra b/hydra
index 5077ee7d9a9f80ac400ce509124352300e7f8e43..c4a8a321b33f0b3e67997220eabaf8cb57918adc 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 5077ee7d9a9f80ac400ce509124352300e7f8e43
+Subproject commit c4a8a321b33f0b3e67997220eabaf8cb57918adc