diff --git a/lib/src/deployments/deployments_api.dart b/lib/src/deployments/deployments_api.dart
index 49827fa..831faa9 100644
--- a/lib/src/deployments/deployments_api.dart
+++ b/lib/src/deployments/deployments_api.dart
@@ -27,11 +27,11 @@ class DeploymentsApi {
 
     final payload = {
       'version': version,
-      if (ownerName != null) 'ownerName': ownerName,
-      if (emailAddress != null) 'emailAddress': emailAddress,
-      if (comment != null) 'comment': comment,
-      if (scmIdentifier != null) 'scmIdentifier': scmIdentifier,
-      if (scmType != null) 'scmType': scmType,
+      'ownerName': ?ownerName,
+      'emailAddress': ?emailAddress,
+      'comment': ?comment,
+      'scmIdentifier': ?scmIdentifier,
+      'scmType': ?scmType,
       'deployedAt': DateTime.now().toUtc().toIso8601String(),
     };
 
diff --git a/pubspec.lock b/pubspec.lock
index c3e1a65..2ce49d6 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -237,10 +237,10 @@ packages:
     dependency: "direct dev"
     description:
       name: lints
-      sha256: a5e2b223cb7c9c8efdc663ef484fdd95bb243bff242ef5b13e26883547fce9a0
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
       url: "https://pub.dev"
     source: hosted
-    version: "6.0.0"
+    version: "6.1.0"
   logging:
     dependency: transitive
     description: