diff --git a/plume-models/Cargo.toml b/plume-models/Cargo.toml
index e61494ef..42d78cd8 100644
--- a/plume-models/Cargo.toml
+++ b/plume-models/Cargo.toml
@@ -35,6 +35,7 @@ tracing = "0.1.22"
 riker = "0.4.2"
 once_cell = "1.5.2"
 lettre = "0.9.6"
+native-tls = "0.2.8"
 
 [dependencies.chrono]
 features = ["serde"]