diff --git a/Cargo.lock b/Cargo.lock
index 4adb79b1..0b2bc03c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -144,9 +144,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.5.1"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+checksum = "a8b34ba8cfb21243bd8df91854c830ff0d785fff2e82ebd4434c2644cb9ada18"
 
 [[package]]
 name = "salsa20"
diff --git a/chacha20/Cargo.toml b/chacha20/Cargo.toml
index f4cc6e33..35bde288 100644
--- a/chacha20/Cargo.toml
+++ b/chacha20/Cargo.toml
@@ -19,7 +19,7 @@ edition = "2018"
 [dependencies]
 cfg-if = "1"
 cipher = { version = "=0.3.0-pre.4", optional = true }
-rand_core = { version = "0.5", optional = true, default-features = false }
+rand_core = { version = "0.6", optional = true, default-features = false }
 zeroize = { version = "1", optional = true, default-features = false }
 
 [target.'cfg(any(target_arch = "x86_64", target_arch = "x86"))'.dependencies]