diff --git a/warpgate-common/src/config.rs b/warpgate-common/src/config.rs
index bc524d70..c8038dd8 100644
--- a/warpgate-common/src/config.rs
+++ b/warpgate-common/src/config.rs
@@ -103,8 +103,11 @@ pub struct TargetHTTPOptions {
 
 #[derive(Debug, Deserialize, Serialize, Clone, Enum, PartialEq, Eq)]
 pub enum TlsMode {
+    #[serde(rename = "disabled")]
     Disabled,
+    #[serde(rename = "preferred")]
     Preferred,
+    #[serde(rename = "required")]
     Required,
 }