diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d3dd6d..6becbac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
+## 2.14.0
+
+- Add support for base64 encoded secrets (https://github.com/jonasroussel/dart_jsonwebtoken/pull/54)
+- Fix `exp`, `nbf` and `iat` checks by casting the value to `int`
+
 ## 2.13.0
 
-- Fix invalid ECDSA signature for keys that are not a multiple of 8 (e.g. secp521r1) (https://github.com/jonasroussel/dart_jsonwebtoken/issues/51) 
+- Fix invalid ECDSA signature for keys that are not a multiple of 8 (e.g. secp521r1) (https://github.com/jonasroussel/dart_jsonwebtoken/issues/51)
 
 ## 2.12.2
 
diff --git a/lib/src/jwt.dart b/lib/src/jwt.dart
index 2f607e8..77ff376 100644
--- a/lib/src/jwt.dart
+++ b/lib/src/jwt.dart
@@ -63,7 +63,7 @@ class JWT {
         // exp
         if (checkExpiresIn && payload.containsKey('exp')) {
           final exp = DateTime.fromMillisecondsSinceEpoch(
-            payload['exp'] * 1000,
+            (payload['exp'] * 1000).toInt(),
           );
           if (exp.isBefore(clock.now())) {
             throw JWTExpiredException();
@@ -73,7 +73,7 @@ class JWT {
         // nbf
         if (checkNotBefore && payload.containsKey('nbf')) {
           final nbf = DateTime.fromMillisecondsSinceEpoch(
-            payload['nbf'] * 1000,
+            (payload['nbf'] * 1000).toInt(),
           );
           if (nbf.isAfter(clock.now())) {
             throw JWTNotActiveException();
@@ -86,7 +86,7 @@ class JWT {
             throw JWTInvalidException('invalid issue at');
           }
           final iat = DateTime.fromMillisecondsSinceEpoch(
-            payload['iat'] * 1000,
+            (payload['iat'] * 1000).toInt(),
           );
           if (!iat.isAtSameMomentAs(clock.now())) {
             throw JWTInvalidException('invalid issue at');
diff --git a/pubspec.yaml b/pubspec.yaml
index 4a03dd8..5692ba6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_jsonwebtoken
 description: A dart implementation of the famous javascript library 'jsonwebtoken' (JWT).
-version: 2.13.0
+version: 2.14.0
 repository: https://github.com/jonasroussel/dart_jsonwebtoken
 homepage: https://github.com/jonasroussel/dart_jsonwebtoken#readme