diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5722174..9199909 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## v7.7.0 (2026-06-25)
+
+- Adds `params` to `request_pin` ensuring users can pass `easypost_details` to the call
+
 ## v7.6.0 (2026-02-25)
 
 - Adds generic `make_api_call` function
diff --git a/VERSION b/VERSION
index 93c8dda..1985849 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.6.0
+7.7.0
diff --git a/lib/easypost/services/fedex_registration.rb b/lib/easypost/services/fedex_registration.rb
index f1d9e7d..9fc99a7 100644
--- a/lib/easypost/services/fedex_registration.rb
+++ b/lib/easypost/services/fedex_registration.rb
@@ -14,11 +14,10 @@ def register_address(fedex_account_number, params = {})
   end
 
   # Request a PIN for FedEx account verification.
-  def request_pin(fedex_account_number, pin_method_option)
-    wrapped_params = {
-      pin_method: {
-        option: pin_method_option,
-      },
+  def request_pin(fedex_account_number, pin_method_option, params = {})
+    wrapped_params = wrap_pin_validation(params)
+    wrapped_params[:pin_method] = {
+      option: pin_method_option,
     }
     endpoint = "fedex_registrations/#{fedex_account_number}/pin"
 
diff --git a/spec/fedex_registration_spec.rb b/spec/fedex_registration_spec.rb
index 84b9364..de72a7a 100644
--- a/spec/fedex_registration_spec.rb
+++ b/spec/fedex_registration_spec.rb
@@ -50,7 +50,15 @@
   describe '.request_pin' do
     it 'requests a pin' do
       fedex_account_number = '123456789'
-      wrapped_params = {
+      params = {
+        easypost_details: {
+          carrier_account_id: 'ca_123',
+        },
+      }
+      expected_params = {
+        easypost_details: {
+          carrier_account_id: 'ca_123',
+        },
         pin_method: {
           option: 'SMS',
         },
@@ -63,10 +71,10 @@
       allow(client).to receive(:make_request).with(
         :post,
         "fedex_registrations/#{fedex_account_number}/pin",
-        wrapped_params,
+        expected_params,
       ).and_return(json_response)
 
-      response = client.fedex_registration.request_pin(fedex_account_number, 'SMS')
+      response = client.fedex_registration.request_pin(fedex_account_number, 'SMS', params)
 
       expect(response).to be_an_instance_of(EasyPost::Models::EasyPostObject)
       expect(response.message).to eq('sent secured Pin')