diff --git a/Cargo.lock b/Cargo.lock
index 42feb56..5147e15 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -768,9 +768,9 @@ checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
 [[package]]
 name = "email-encoding"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea3d894bbbab314476b265f9b2d46bf24b123a36dd0e96b06a1b49545b9d9dcc"
+checksum = "20b9cde6a71f9f758440470f3de16db6c09a02c443ce66850d87f5410548fb8e"
 dependencies = [
  "base64",
  "memchr",
diff --git a/Cargo.toml b/Cargo.toml
index e8401bc..b8cfd40 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ mime = { version = "0.3.4", optional = true }
 fastrand = { version = "2.0", optional = true }
 quoted_printable = { version = "0.5", optional = true }
 base64 = { version = "0.22", optional = true }
-email-encoding = { version = "0.3", optional = true }
+email-encoding = { version = "0.4", optional = true }
 
 # file transport
 uuid = { version = "1", features = ["v4"], optional = true }