diff --git a/config/cashier.php b/config/cashier.php
index a132ada3..be42f613 100644
--- a/config/cashier.php
+++ b/config/cashier.php
@@ -46,11 +46,11 @@
         'webhook_url' => 'webhooks/mollie/first-payment',
 
         /**
-         * A comma-separated list of allowed Mollie payment methods for the first payment. Make sure the methods are
-         * enabled in the Mollie dashboard. Set to NULL to let Mollie handle this for you. Can be overridden per plan.
-         * @example 'ideal,creditcard'
+         * Array of allowed Mollie payment methods for the first payment. Make sure the methods are
+         * enabled in the Mollie dashboard. Set to [] to let Mollie handle this for you. Can be overridden per plan.
+         * @example ['ideal', 'creditcard']
          */
-        'method' => null,
+        'method' => [],
 
         /**
          * The default url the customer is redirected to after the Mollie first payment checkout screen. Can be
diff --git a/src/FirstPayment/FirstPaymentBuilder.php b/src/FirstPayment/FirstPaymentBuilder.php
index 90b79faf..04b8e046 100644
--- a/src/FirstPayment/FirstPaymentBuilder.php
+++ b/src/FirstPayment/FirstPaymentBuilder.php
@@ -6,10 +6,13 @@
 use Illuminate\Support\Str;
 use Laravel\Cashier\Cashier;
 use Laravel\Cashier\FirstPayment\Actions\ActionCollection;
+use Laravel\Cashier\FirstPayment\Traits\PaymentMethodString;
 use Mollie\Api\Types\SequenceType;
 
 class FirstPaymentBuilder
 {
+    use PaymentMethodString;
+
     /**
      * The billable model.
      *
@@ -136,11 +139,15 @@ public function create()
     }
 
     /**
-     * @param string $method
+     * @param array|string $method
      * @return FirstPaymentBuilder
      */
-    public function setFirstPaymentMethod(?string $method)
+    public function setFirstPaymentMethod($method)
     {
+        if(is_string($method)) {
+            $method = $this->castPaymentMethodString($method);
+        }
+
         $this->method = $method;
 
         return $this;
diff --git a/src/FirstPayment/Traits/PaymentMethodString.php b/src/FirstPayment/Traits/PaymentMethodString.php
new file mode 100644
index 00000000..6389cd7f
--- /dev/null
+++ b/src/FirstPayment/Traits/PaymentMethodString.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Laravel\Cashier\FirstPayment\Traits;
+
+trait PaymentMethodString
+{
+    /**
+     * Backwards compatible: split strings into array
+     *
+     * @param  string  $method
+     *
+     * @return string[]
+     */
+    private function castPaymentMethodString(string $method)
+    {
+        return collect(explode(',', $method))
+            ->map(function ($methodString) {
+                return trim($methodString);
+            })
+            ->filter()
+            ->unique();
+    }
+}
diff --git a/src/Plan/Contracts/Plan.php b/src/Plan/Contracts/Plan.php
index 4083ce21..343fa556 100644
--- a/src/Plan/Contracts/Plan.php
+++ b/src/Plan/Contracts/Plan.php
@@ -54,10 +54,10 @@ public function setFirstPaymentAmount(Money $firstPaymentAmount);
     public function firstPaymentMethod();
 
     /**
-     * @param string $firstPaymentMethod
+     * @param array|string $firstPaymentMethod
      * @return Plan
      */
-    public function setFirstPaymentMethod(?string $firstPaymentMethod);
+    public function setFirstPaymentMethod($firstPaymentMethod);
 
     /**
      * The description for the mandate payment order item.
diff --git a/src/Plan/Plan.php b/src/Plan/Plan.php
index 024c1391..05b6cc5e 100644
--- a/src/Plan/Plan.php
+++ b/src/Plan/Plan.php
@@ -4,12 +4,16 @@
 
 namespace Laravel\Cashier\Plan;
 
+use Laravel\Cashier\FirstPayment\Traits\PaymentMethodString;
 use Laravel\Cashier\Order\OrderItemPreprocessorCollection;
 use Laravel\Cashier\Plan\Contracts\Plan as PlanContract;
 use Money\Money;
 
 class Plan implements PlanContract
 {
+
+    use PaymentMethodString;
+
     /**
      * A unique reference for this plan.
      *
@@ -49,8 +53,8 @@ class Plan implements PlanContract
     /**
      * The first payment method
      *
-     * @var string
-     * @example ideal
+     * @var array
+     * @example ['ideal']
      */
     protected $firstPaymentMethod;
 
@@ -146,7 +150,7 @@ public function setDescription(string $description)
     }
 
     /**
-     * @return string
+     * @return array
      */
     public function firstPaymentMethod()
     {
@@ -154,11 +158,15 @@ public function firstPaymentMethod()
     }
 
     /**
-     * @param string $firstPaymentMethod
+     * @param  array|string  $firstPaymentMethod
      * @return $this
      */
-    public function setFirstPaymentMethod(?string $firstPaymentMethod)
+    public function setFirstPaymentMethod($firstPaymentMethod)
     {
+        if (is_string($firstPaymentMethod)) {
+            $firstPaymentMethod = $this->castPaymentMethodString($firstPaymentMethod);
+        }
+
         $this->firstPaymentMethod = $firstPaymentMethod;
 
         return $this;