Replace rand_os::OsRng with rand_core::OsRng

rand_os::OsRng has been deprecated.  Instead we can use rand_core with
the getrandom feature.

1 files changed, 1 insertions, 2 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 320e69d..16bd3b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,8 +20,7 @@ exclude = [".builds/*"]
 lazy_static = "1.2"
 libc = "0.2"
 nitrokey-sys = "3.5"
-rand_core = {version = "0.5", default-features = false, features = ["std"] }
-rand_os = {version = "0.2"}
+rand_core = {version = "0.5.1", features = ["getrandom"] }
 
 [dev-dependencies]
 nitrokey-test = "0.3"