diff --git a/passkit/pubspec.yaml b/passkit/pubspec.yaml
index e2eac6d..0f5598d 100644
--- a/passkit/pubspec.yaml
+++ b/passkit/pubspec.yaml
@@ -32,7 +32,7 @@ dependencies:
   json_annotation: ^4.8.0
   meta: ^1.0.0
   pkcs7: ^1.0.0
-  pointycastle: ^3.7.0
+  pointycastle: ^4.0.0
 
 dev_dependencies:
   build_runner: ^2.3.2