diff --git a/Package.swift b/Package.swift
old mode 100644
new mode 100755
index 78fabf7..6071817
--- a/Package.swift
+++ b/Package.swift
@@ -9,7 +9,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/vapor/vapor.git", from: "3.0.0"),
-        .package(url: "https://github.com/vapor/jwt.git", from: "3.0.0-rc")
+        .package(url: "https://github.com/vapor/jwt.git", from: "3.0.0")
     ],
     targets: [
         .target(name: "Imperial", dependencies: ["Vapor", "JWT"]),
diff --git a/Sources/Imperial/Services/GoogleJWT/GoogleJWTPayload.swift b/Sources/Imperial/Services/GoogleJWT/GoogleJWTPayload.swift
old mode 100644
new mode 100755
index 180a84a..c402d53
--- a/Sources/Imperial/Services/GoogleJWT/GoogleJWTPayload.swift
+++ b/Sources/Imperial/Services/GoogleJWT/GoogleJWTPayload.swift
@@ -7,8 +7,8 @@ public struct GoogleJWTPayload: JWTPayload {
     public var aud: AudienceClaim
     public var iat: IssuedAtClaim
     public var exp: ExpirationClaim
-    
-    public func verify() throws {
-        try exp.verify()
+
+    public func verify(using signer: JWTSigner) throws {
+        try exp.verifyNotExpired()
     }
 }