diff --git a/src/header.rs b/src/header.rs
index ba4b685..b45c191 100644
--- a/src/header.rs
+++ b/src/header.rs
@@ -37,6 +37,11 @@ pub struct Header {
     /// Defined in [RFC7515#4.1.5](https://tools.ietf.org/html/rfc7515#section-4.1.5).
     #[serde(skip_serializing_if = "Option::is_none")]
     pub x5u: Option<String>,
+    /// X.509 certificate chain. A Vec of base64 encoded ASN.1 DER certificates.
+    ///
+    /// Defined in [RFC7515#](https://tools.ietf.org/html/rfc7515#section-4.1.6).
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub x5c: Option<Vec<String>>,
     /// X.509 certificate thumbprint
     ///
     /// Defined in [RFC7515#4.1.7](https://tools.ietf.org/html/rfc7515#section-4.1.7).
@@ -55,6 +60,7 @@ impl Header {
             kid: None,
             x5u: None,
             x5t: None,
+            x5c: None,
         }
     }