diff --git a/README.md b/README.md
index b91523c..694aa3b 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ shared:
     # Token auth params
     # See https://developer.apple.com/documentation/usernotifications/establishing-a-token-based-connection-to-apns
     key_id: <%= Rails.application.credentials.dig(:action_push_native, :apns, :key_id) %>
-    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key) %>
+    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key)&.dump %>
 
     team_id: your_apple_team_id
     # Your identifier found on https://developer.apple.com/account/resources/identifiers/list
@@ -85,7 +85,7 @@ shared:
   google:
     # Your Firebase project service account credentials
     # See https://firebase.google.com/docs/cloud-messaging/auth-server
-    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key) %>
+    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key)&.dump %>
 
     # Firebase project_id
     project_id: your_project_id
@@ -131,7 +131,7 @@ shared:
       # Token auth params
       # See https://developer.apple.com/documentation/usernotifications/establishing-a-token-based-connection-to-apns
       key_id: <%= Rails.application.credentials.dig(:action_push_native, :apns, :calendar, :key_id) %>
-      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :calendar, :encryption_key) %>
+      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :calendar, :encryption_key)&.dump %>
       # Your identifier found on https://developer.apple.com/account/resources/identifiers/list
       topic: calendar.bundle.identifier
 
@@ -139,7 +139,7 @@ shared:
       # Token auth params
       # See https://developer.apple.com/documentation/usernotifications/establishing-a-token-based-connection-to-apns
       key_id: <%= Rails.application.credentials.dig(:action_push_native, :apns, :email, :key_id) %>
-      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :email, :encryption_key) %>
+      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :email, :encryption_key)&.dump %>
       # Your identifier found on https://developer.apple.com/account/resources/identifiers/list
       topic: email.bundle.identifier
 
@@ -147,7 +147,7 @@ shared:
     calendar:
       # Your Firebase project service account credentials
       # See https://firebase.google.com/docs/cloud-messaging/auth-server
-      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :calendar, :encryption_key) %>
+      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :calendar, :encryption_key)&.dump %>
 
       # Firebase project_id
       project_id: calendar_project_id
@@ -155,7 +155,7 @@ shared:
     email:
       # Your Firebase project service account credentials
       # See https://firebase.google.com/docs/cloud-messaging/auth-server
-      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :email, :encryption_key) %>
+      encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :email, :encryption_key)&.dump %>
 
       # Firebase project_id
       project_id: email_project_id
diff --git a/lib/generators/action_push_native/install/templates/config/push.yml.tt b/lib/generators/action_push_native/install/templates/config/push.yml.tt
index 6bc9e01..4e5c813 100644
--- a/lib/generators/action_push_native/install/templates/config/push.yml.tt
+++ b/lib/generators/action_push_native/install/templates/config/push.yml.tt
@@ -4,7 +4,7 @@ shared:
     # Token auth params
     # See https://developer.apple.com/documentation/usernotifications/establishing-a-token-based-connection-to-apns
     key_id: <%%= Rails.application.credentials.dig(:action_push_native, :apns, :key_id) %>
-    encryption_key: <%%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key) %>
+    encryption_key: <%%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key)&.dump %>
 
     team_id: your_apple_team_id
     # Your identifier found on https://developer.apple.com/account/resources/identifiers/list
@@ -27,7 +27,7 @@ shared:
   google:
     # Your Firebase project service account credentials
     # See https://firebase.google.com/docs/cloud-messaging/auth-server
-    encryption_key: <%%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key) %>
+    encryption_key: <%%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key)&.dump %>
 
     # Firebase project_id
     project_id: your_project_id
diff --git a/test/dummy/config/push.yml b/test/dummy/config/push.yml
index 792fd9b..94f90e8 100644
--- a/test/dummy/config/push.yml
+++ b/test/dummy/config/push.yml
@@ -4,7 +4,7 @@ shared:
     # Token auth params
     # See https://developer.apple.com/documentation/usernotifications/establishing-a-token-based-connection-to-apns
     key_id: <%= Rails.application.credentials.dig(:action_push_native, :apns, :key_id) %>
-    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key) %>
+    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :apns, :encryption_key)&.dump %>
 
     team_id: your_apple_team_id
     # Your identifier found on https://developer.apple.com/account/resources/identifiers/list
@@ -27,7 +27,7 @@ shared:
   google:
     # Your Firebase project service account credentials
     # See https://firebase.google.com/docs/cloud-messaging/auth-server
-    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key) %>
+    encryption_key: <%= Rails.application.credentials.dig(:action_push_native, :fcm, :encryption_key)&.dump %>
 
     # Set this to the number of threads used to process notifications (default: 5).
     # When the pool size is too small a HTTPX::PoolTimeoutError error will be raised.