diff --git a/src/JwksClient.js b/src/JwksClient.js
index f50fa7ff..7debe82d 100644
--- a/src/JwksClient.js
+++ b/src/JwksClient.js
@@ -66,7 +66,18 @@ export class JwksClient {
       }
 
       const signingKeys = keys
-        .filter(key => key.use === 'sig' && key.kty === 'RSA' && key.kid && ((key.x5c && key.x5c.length) || (key.n && key.e)))
+          .filter((key) => {
+            if(key.kty !== 'RSA'){
+              return false;
+            }
+            if(!key.kid){
+              return false;
+            }
+            if(key.hasOwnProperty('use') && key.use !== 'sig'){
+              return false;
+            }  
+            return ((key.x5c && key.x5c.length) || (key.n && key.e));
+        })
         .map(key => {
           if (key.x5c && key.x5c.length) {
             return {
diff --git a/tests/jwksClient.tests.js b/tests/jwksClient.tests.js
index bb685dd4..17557d0f 100644
--- a/tests/jwksClient.tests.js
+++ b/tests/jwksClient.tests.js
@@ -278,7 +278,24 @@ describe("JwksClient", () => {
               e: "AQAB",
               n:
                 "s4W7xjkQZP3OwG7PfRgcYKn8eRYXHiz1iK503fS-K2FZo-Ublwwa2xFZWpsUU_jtoVCwIkaqZuo6xoKtlMYXXvfVHGuKBHEBVn8b8x_57BQWz1d0KdrNXxuMvtFe6RzMqiMqzqZrzae4UqVCkYqcR9gQx66Ehq7hPmCxJCkg7ajo7fu6E7dPd34KH2HSYRsaaEA_BcKTeb9H1XE_qEKjog68wUU9Ekfl3FBIRN-1Ah_BoktGFoXyi_jt0-L0-gKcL1BLmUlGzMusvRbjI_0-qj-mc0utGdRjY-xIN2yBj8vl4DODO-wMwfp-cqZbCd9TENyHaTb8iA27s-73L3ExOQ"
-            }
+            },
+            {
+              kid: "IdTokenSigningKeyContainer.v3",
+              nbf: 1459289287,
+              kty: "RSA",
+              e: "AQAB",
+              n:
+                "s4W7xjkQZP3OwG7PfRgcYKn8eRYXHiz1iK503fS-K2FZo-Ublwwa2xFZWpsUU_jtoVCwIkaqZuo6xoKtlMYXXvfVHGuKBHEBVn8b8x_57BQWz1d0KdrNXxuMvtFe6RzMqiMqzqZrzae4UqVCkYqcR9gQx66Ehq7hPmCxJCkg7ajo7fu6E7dPd34KH2HSYRsaaEA_BcKTeb9H1XE_qEKjog68wUU9Ekfl3FBIRN-1Ah_BoktGFoXyi_jt0-L0-gKcL1BLmUlGzMusvRbjI_0-qj-mc0utGdRjY-xIN2yBj8vl4DODO-wMwfp-cqZbCd9TENyHaTb8iA27s-73L3ExOQ"
+            },
+            {
+              kid: "IdTokenSigningKeyContainer.v4",
+              nbf: 1459289287,
+              use: "enc",
+              kty: "RSA",
+              e: "AQAB",
+              n:
+                "s4W7xjkQZP3OwG7PfRgcYKn8eRYXHiz1iK503fS-K2FZo-Ublwwa2xFZWpsUU_jtoVCwIkaqZuo6xoKtlMYXXvfVHGuKBHEBVn8b8x_57BQWz1d0KdrNXxuMvtFe6RzMqiMqzqZrzae4UqVCkYqcR9gQx66Ehq7hPmCxJCkg7ajo7fu6E7dPd34KH2HSYRsaaEA_BcKTeb9H1XE_qEKjog68wUU9Ekfl3FBIRN-1Ah_BoktGFoXyi_jt0-L0-gKcL1BLmUlGzMusvRbjI_0-qj-mc0utGdRjY-xIN2yBj8vl4DODO-wMwfp-cqZbCd9TENyHaTb8iA27s-73L3ExOQ"
+            },
           ]
         });
 
@@ -289,12 +306,13 @@ describe("JwksClient", () => {
       client.getSigningKeys((err, keys) => {
         expect(err).to.be.null;
         expect(keys).not.to.be.null;
-        expect(keys.length).to.equal(2);
+        expect(keys.length).to.equal(3);
         expect(keys[0].rsaPublicKey).not.to.be.null;
         expect(keys[0].kid).to.equal("IdTokenSigningKeyContainer");
         expect(keys[1].kid).to.equal("IdTokenSigningKeyContainer.v2");
         expect(keys[1].rsaPublicKey).not.to.be.null;
         expect(keys[1].nbf).to.equal(1459289287);
+        expect(keys[2].rsaPublicKey).not.to.be.null;
         done();
       });
     });