diff --git a/Cargo.toml b/Cargo.toml
index 5a065e258..759fd3d0f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,13 +15,13 @@ homepage = "https://github.com/ebfull/pairing"
 repository = "https://github.com/ebfull/pairing"
 
 [dependencies]
-rand_core = "0.4"
 byteorder = "1"
 ff = { path = "../ff", features = ["derive"] }
 group = { path = "../group" }
+rand_core = "0.5"
 
 [dev-dependencies]
-rand_xorshift = "0.1"
+rand_xorshift = "0.2"
 
 [features]
 unstable-features = ["expose-arith"]