diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 2c3c445b4..cd9db3c52 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -546,6 +546,7 @@ interface JsonWebKey {
     ext?: boolean;
     k?: string;
     key_ops?: string[];
+    kid?: string;
     kty?: string;
     n?: string;
     oth?: RsaOtherPrimesInfo[];
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 1b22f9d54..ef9187c27 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -216,6 +216,7 @@ interface JsonWebKey {
     ext?: boolean;
     k?: string;
     key_ops?: string[];
+    kid?: string;
     kty?: string;
     n?: string;
     oth?: RsaOtherPrimesInfo[];
diff --git a/inputfiles/idl/Web Cryptography.widl b/inputfiles/idl/Web Cryptography.widl
index 7907cf788..08220559c 100644
--- a/inputfiles/idl/Web Cryptography.widl	
+++ b/inputfiles/idl/Web Cryptography.widl	
@@ -115,6 +115,9 @@ dictionary JsonWebKey {
   DOMString qi;
   sequence<RsaOtherPrimesInfo> oth;
   DOMString k;
+
+  // The following field is defined in Section 4.5 of RFC7517
+  DOMString kid;
 };
 
 typedef Uint8Array BigInteger;