diff --git a/advotracker_client/Cargo.toml b/advotracker_client/Cargo.toml
index 9763522..07ae629 100644
--- a/advotracker_client/Cargo.toml
+++ b/advotracker_client/Cargo.toml
@@ -24,7 +24,7 @@ clap = { version = "~2.33", features = ["suggestions", "color"] }
 csv = { version = "~1.1" }
 dotenv = { version = "~0.15.0" }
 envy = { version = "~0.4" }
-lettre ={ version = "0.10.0-beta.1" }
+lettre ={ version = "0.10.0-rc.3" }
 lazy_static = { version = "~1.4.0" }
 log = { version = "~0.4.8" }
 maud = { version = "~0.22.1" }
diff --git a/advotracker_client/src/services/exports/send_ticketdata.rs b/advotracker_client/src/services/exports/send_ticketdata.rs
index 9872c59..5b48a2c 100644
--- a/advotracker_client/src/services/exports/send_ticketdata.rs
+++ b/advotracker_client/src/services/exports/send_ticketdata.rs
@@ -76,16 +76,12 @@ pub fn sendticketdata(email: &Email, lang: &Lang) -> Result<(), Box<dyn Error>>
             MultiPart::alternative() // This is composed of two parts.
                 .singlepart(
                     SinglePart::builder()
-                        .header(header::ContentType(
-                            "text/plain; charset=utf8".parse().unwrap(),
-                        ))
+                        .header(header::ContentType::TEXT_PLAIN)
                         .body(String::from(ascii_body)),
                 )
                 .singlepart(
                     SinglePart::builder()
-                        .header(header::ContentType(
-                            "text/html; charset=utf8".parse().unwrap(),
-                        ))
+                        .header(header::ContentType::TEXT_PLAIN)
                         .body(html.into_string()),
                 ),
         )