diff --git a/appsTransport.go b/appsTransport.go
index be59c84..4e52fde 100644
--- a/appsTransport.go
+++ b/appsTransport.go
@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	jwt "github.com/dgrijalva/jwt-go/v4"
+	jwt "github.com/dgrijalva/jwt-go"
 )
 
 // AppsTransport provides a http.RoundTripper by wrapping an existing
@@ -64,14 +64,7 @@ func NewAppsTransportFromPrivateKey(tr http.RoundTripper, appID int64, key *rsa.
 
 // RoundTrip implements http.RoundTripper interface.
 func (t *AppsTransport) RoundTrip(req *http.Request) (*http.Response, error) {
-	claims := &jwt.StandardClaims{
-		IssuedAt:  jwt.Now(),
-		ExpiresAt: jwt.At(time.Now().Add(time.Minute)),
-		Issuer:    strconv.FormatInt(t.appID, 10),
-	}
-	bearer := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
-
-	ss, err := bearer.SignedString(t.key)
+	ss, err := t.Token()
 	if err != nil {
 		return nil, fmt.Errorf("could not sign jwt: %s", err)
 	}
@@ -82,3 +75,15 @@ func (t *AppsTransport) RoundTrip(req *http.Request) (*http.Response, error) {
 	resp, err := t.tr.RoundTrip(req)
 	return resp, err
 }
+
+// Token returns the complete, signed Github app JWT token
+func (t *AppsTransport) Token() (string, error) {
+	claims := &jwt.StandardClaims{
+		IssuedAt:  time.Now().Unix(),
+		ExpiresAt: time.Now().Add(time.Minute).Unix(),
+		Issuer:    strconv.FormatInt(t.appID, 10),
+	}
+	bearer := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
+
+	return bearer.SignedString(t.key)
+}
diff --git a/go.mod b/go.mod
index efcad42..05f170d 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/bradleyfalzon/ghinstallation
 go 1.13
 
 require (
-	github.com/dgrijalva/jwt-go/v4 v4.0.0-preview1
+	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/google/go-cmp v0.4.0
 	github.com/google/go-github/v30 v30.0.0
 )
diff --git a/go.sum b/go.sum
index 541aca2..afa4c48 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/dgrijalva/jwt-go/v4 v4.0.0-preview1 h1:CaO/zOnF8VvUfEbhRatPcwKVWamvbYd8tQGRWacE9kU=
-github.com/dgrijalva/jwt-go/v4 v4.0.0-preview1/go.mod h1:+hnT3ywWDTAFrW5aE+u2Sa/wT555ZqwoCS+pk3p6ry4=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=