diff --git a/src/clj_jwt/intdate.clj b/src/clj_jwt/intdate.clj
index ac2b32f..2e30694 100644
--- a/src/clj_jwt/intdate.clj
+++ b/src/clj_jwt/intdate.clj
@@ -7,7 +7,7 @@
 (defn joda-time->intdate
   [d]
   {:pre [(joda-time? d)]}
-  (int (/ (to-long d) 1000)))
+  (long (/ (to-long d) 1000)))
 
 
 (defn intdate->joda-time