diff --git a/Cargo.lock b/Cargo.lock
index 3e0ea69..cf9cc9f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -244,9 +244,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7277392b266383ef8396db7fdeb1e77b6c52fed775f5df15bb24f35b72156980"
+checksum = "1f628eaec48bfd21b865dc2950cfa014450c01d2fa2b69a86c2fd5844ec523c0"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
@@ -254,6 +254,7 @@ dependencies = [
  "serde",
  "sha2",
  "signature",
+ "subtle",
  "zeroize",
 ]