diff --git a/Cargo.toml b/Cargo.toml
index bb6698ab4..bedff1be7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ num-traits = "0.2.6"
 native-tls = "0.2.3"
 lettre = "0.9.0"
 imap = "1.0.1"
-mmime = { git = "https://github.com/dignifiedquire/mmime" }
+mmime = { git = "https://github.com/dignifiedquire/mmime", branch = "snprintf-3" }
 base64 = "0.10"
 charset = "0.1"
 percent-encoding = "1.0"