diff --git a/Cargo.lock b/Cargo.lock
index fe936bcec..5f0efa1db 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -200,8 +200,7 @@ dependencies = [
 [[package]]
 name = "async-smtp"
 version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a243eb83ec706b4bed429fc6917e8a103edb8c083720e5347a57a2766ffd41c"
+source = "git+https://github.com/async-email/async-smtp?rev=2275fd8d13e39b2c58d6605c786ff06ff9e05708#2275fd8d13e39b2c58d6605c786ff06ff9e05708"
 dependencies = [
  "async-native-tls",
  "async-std",
diff --git a/Cargo.toml b/Cargo.toml
index 9eeb1f00c..987be0d06 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ smallvec = "1.0.0"
 surf = { version = "2.0.0-alpha.4", default-features = false, features = ["h1-client"] }
 num-derive = "0.3.0"
 num-traits = "0.2.6"
-async-smtp = "0.3"
+async-smtp = { git = "https://github.com/async-email/async-smtp", rev="2275fd8d13e39b2c58d6605c786ff06ff9e05708" }
 email = { git = "https://github.com/deltachat/rust-email", branch = "master" }
 lettre_email = { git = "https://github.com/deltachat/lettre", branch = "master" }
 async-imap = "0.4.0"