diff --git a/rust-toolchain b/rust-toolchain
index 1b564641e87864de685fe8a007a6d198d2dc9ee1..109362ded20b7cd6c39b6ddd72c3e8d16a2b586e 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2019-04-06
+nightly-2019-05-10