diff --git a/csrf.go b/csrf.go
index 03b9a50..14cb756 100644
--- a/csrf.go
+++ b/csrf.go
@@ -3,6 +3,7 @@ package middleware
 import (
 	"crypto/rand"
 	"crypto/subtle"
+	"encoding/base64"
 	"errors"
 	"strings"
 	"time"
@@ -163,6 +164,8 @@ func CSRFWithConfig(config CSRFConfig) Interceptor {
 
 				return
 			}
+
+			token = []byte(base64.RawURLEncoding.EncodeToString(token))
 		}
 
 		switch {