diff --git a/src/lib.rs b/src/lib.rs
index bd3c9af8..bf9c0568 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -35,9 +35,11 @@ use openidconnect::{
     Scope,
 };
 
+#[derive(Debug, Deserialize, Serialize)]
 pub struct OpenIdConfig {
     pub issuer_url: String,
     pub client_id: String,
+    #[serde(skip_serializing_if="Option::is_none")]
     pub client_key: Option<String>,
 }