diff --git a/ch_09/emails/Cargo.lock b/ch_09/emails/Cargo.lock
index 9b696de..71e5d75 100644
--- a/ch_09/emails/Cargo.lock
+++ b/ch_09/emails/Cargo.lock
@@ -1628,9 +1628,9 @@ dependencies = [
 
 [[package]]
 name = "webpki"
-version = "0.22.0"
+version = "0.22.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f095d78192e208183081cc07bc5515ef55216397af48b873e5edcd72637fa1bd"
+checksum = "07ecc0cd7cac091bf682ec5efa18b1cff79d617b84181f38b3951dbe135f607f"
 dependencies = [
  "ring",
  "untrusted",