diff --git a/README.md b/README.md
index e13c996..669964f 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ CI systems.
 - `JIRA_USER`: The ID of the Jira user which is associated with the 'JiraApiToken' secret, eg 'someuser@reload.dk' (**REQUIRED**)
 - `JIRA_PROJECT`: The project key for the Jira project where issues should be created, eg `TEST` or `ABC`. (**REQUIRED** if not set in code)
 - `JIRA_ISSUE_TYPE`: Type of issue to create, e.g. `Security`. Defaults to `Bug`. (*Optional*)
+- `JIRA_PRIORITY`: The priority of issue to create, e.g. `Critical`. (*Optional*)
 - `JIRA_WATCHERS`: Jira users to add as watchers to tickets. Separate
   multiple watchers with comma (no spaces). (*Optional*)
 - `JIRA_RESTRICTED_COMMENT_ROLE`: A comment with restricted visibility
diff --git a/src/JiraSecurityIssue.php b/src/JiraSecurityIssue.php
index ee8e32f..4323857 100644
--- a/src/JiraSecurityIssue.php
+++ b/src/JiraSecurityIssue.php
@@ -43,7 +43,7 @@ class JiraSecurityIssue
     /**
      * Priority of issue to create.
      */
-    protected string $priority = 'Undecided';
+    protected ?string $priority = null;
 
     /**
      * Type of issue to create.
@@ -82,7 +82,7 @@ class JiraSecurityIssue
     public function __construct()
     {
         $this->project = \getenv('JIRA_PROJECT') ?: '';
-        $this->priority = \getenv('JIRA_PRIORITY') ?: 'Undecided';
+        $this->priority = \getenv('JIRA_PRIORITY') ?: null;
         $this->issueType = \getenv('JIRA_ISSUE_TYPE') ?: 'Bug';
         $this->restrictedCommentRole = \getenv('JIRA_RESTRICTED_COMMENT_ROLE') ?: 'Developers';
 
@@ -202,10 +202,13 @@ public function ensure(): string
         $issueField = new IssueField();
         $issueField->setProjectKey($this->project)
             ->setSummary($this->title ?? '')
-            ->setPriorityNameAsString($this->priority)
             ->setIssueTypeAsString($this->issueType)
             ->setDescription($this->body);
 
+        if (\is_string($this->priority)) {
+            $issueField->setPriorityNameAsString($this->priority);
+        }
+
         foreach ($this->keyLabels as $label) {
             $issueField->addLabelAsString($label);
         }