diff --git a/src/config.php b/src/config.php
index 54039f1a..7927a912 100644
--- a/src/config.php
+++ b/src/config.php
@@ -248,13 +248,13 @@
         // - `3`: Append "served by" comment only
         //'outputComments' => true,
 
-        // The priority to give the refresh cache job (the lower the number, the higher the priority). Set to `null` to inherit the default priority.
+        // The priority to give the refresh cache job (the lower the number, the higher the priority). If set to `null`, the default job priority will be used.
         //'refreshCacheJobPriority' => 10,
 
         //The batch size to use for driver jobs that support batching.
         //'driverJobBatchSize' => 100,
 
-        // The priority to give driver jobs (the lower the number, the higher the priority). Set to `null` to inherit the default priority.
+        // The priority to give driver jobs (the lower the number, the higher the priority). If set to `null`, the default job priority will be used.
         //'driverJobPriority' => 100,
 
         // The time to reserve for queue jobs in seconds.
diff --git a/src/jobs/GenerateCacheJob.php b/src/jobs/GenerateCacheJob.php
index a84236b7..0624d7cd 100644
--- a/src/jobs/GenerateCacheJob.php
+++ b/src/jobs/GenerateCacheJob.php
@@ -61,7 +61,7 @@ public function canRetry($attempt, $error): bool
     public function execute($queue): void
     {
         // Decrement (increase) priority so that subsequent batches are prioritised.
-        if ($this->itemOffset === 0) {
+        if ($this->itemOffset === 0 && $this->priority > 0) {
             $this->priority--;
         }
 
diff --git a/src/models/SettingsModel.php b/src/models/SettingsModel.php
index bf55ca71..d134d710 100644
--- a/src/models/SettingsModel.php
+++ b/src/models/SettingsModel.php
@@ -428,9 +428,9 @@ class SettingsModel extends Model
     public int|bool $outputComments = true;
 
     /**
-     * The priority to give the refresh cache job (the lower the number, the higher the priority).
+     * The priority to give the refresh cache job (the lower the number, the higher the priority). If set to `null`, the default job priority will be used.
      */
-    public int $refreshCacheJobPriority = 10;
+    public ?int $refreshCacheJobPriority = 10;
 
     /**
      * The batch size to use for driver jobs that support batching.
@@ -438,9 +438,9 @@ class SettingsModel extends Model
     public int $driverJobBatchSize = 100;
 
     /**
-     * The priority to give driver jobs (the lower the number, the higher the priority).
+     * The priority to give driver jobs (the lower the number, the higher the priority). If set to `null`, the default job priority will be used.
      */
-    public int $driverJobPriority = 100;
+    public ?int $driverJobPriority = 100;
 
     /**
      * The time to reserve for queue jobs in seconds.