diff --git a/Cargo.toml b/Cargo.toml
index 30c415b..74d26ad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ readme = "README.md"
 [dependencies]
 smallvec = {version = "1.4.0", optional = true}
 rand = {version = "0.7", optional = true}
-rand_core = {version = "0.5", optional = true}
+rand_core = {version = "0.6", optional = true}
 clap = {version = "3.0.0-beta.1", optional = true, default-features = false, features = ["std", "derive", "suggestions"]}