diff --git a/src/Plugin/Condition/EntityHasField.php b/src/Plugin/Condition/EntityHasField.php
index a537c33..2f51503 100644
--- a/src/Plugin/Condition/EntityHasField.php
+++ b/src/Plugin/Condition/EntityHasField.php
@@ -50,7 +50,7 @@ class EntityHasField extends RulesConditionBase {
    * @return array
    *   An array of field names keyed on the field name.
    */
-  public function fieldListOptions() {
+  public static function fieldListOptions() {
     $options = [];
 
     // Load all the fields in the system.
diff --git a/src/Plugin/Condition/EntityIsOfBundle.php b/src/Plugin/Condition/EntityIsOfBundle.php
index 3f8c209..06230d2 100644
--- a/src/Plugin/Condition/EntityIsOfBundle.php
+++ b/src/Plugin/Condition/EntityIsOfBundle.php
@@ -78,7 +78,7 @@ class EntityIsOfBundle extends RulesConditionBase {
    * @return array
    *   An array of entity types keyed on the entity type machine name.
    */
-  public function entityTypesListOptions() {
+  public static function entityTypesListOptions() {
     $options = [];
 
     $entity_types = \Drupal::entityTypeManager()->getDefinitions();
@@ -100,7 +100,7 @@ class EntityIsOfBundle extends RulesConditionBase {
    * @return array
    *   An array of bundles keyed on the bundle machine name.
    */
-  public function bundleListOptions() {
+  public static function bundleListOptions() {
     $options = [];
 
     $entity_types = \Drupal::entityTypeManager()->getDefinitions();
diff --git a/src/Plugin/Condition/EntityIsOfType.php b/src/Plugin/Condition/EntityIsOfType.php
index 53dd874..4ab7835 100644
--- a/src/Plugin/Condition/EntityIsOfType.php
+++ b/src/Plugin/Condition/EntityIsOfType.php
@@ -54,7 +54,7 @@ class EntityIsOfType extends RulesConditionBase {
    * @return array
    *   An array of entity types keyed on the entity type machine name.
    */
-  public function entityTypesListOptions() {
+  public static function entityTypesListOptions() {
     $options = [];
 
     $entity_types = \Drupal::entityTypeManager()->getDefinitions();
diff --git a/src/Plugin/Condition/NodeIsOfType.php b/src/Plugin/Condition/NodeIsOfType.php
index 85527c8..16cd031 100644
--- a/src/Plugin/Condition/NodeIsOfType.php
+++ b/src/Plugin/Condition/NodeIsOfType.php
@@ -48,7 +48,7 @@ class NodeIsOfType extends RulesConditionBase {
    * @return array
    *   An array of node types keyed on the node type machine name.
    */
-  public function nodeTypesListOptions() {
+  public static function nodeTypesListOptions() {
     $options = [];
 
     $node_types = \Drupal::service('entity.manager')->getStorage('node_type')->loadMultiple();
diff --git a/src/Plugin/Condition/UserHasRole.php b/src/Plugin/Condition/UserHasRole.php
index bfaad94..45058e6 100644
--- a/src/Plugin/Condition/UserHasRole.php
+++ b/src/Plugin/Condition/UserHasRole.php
@@ -74,7 +74,7 @@ class UserHasRole extends RulesConditionBase {
    * @return array
    *   An array of user roles keyed on role name.
    */
-  public function userRolesListOptions() {
+  public static function userRolesListOptions() {
     return user_role_names(TRUE);
   }
 
diff --git a/src/Plugin/RulesAction/UserRoleAdd.php b/src/Plugin/RulesAction/UserRoleAdd.php
index e51d7c0..cd6ce17 100644
--- a/src/Plugin/RulesAction/UserRoleAdd.php
+++ b/src/Plugin/RulesAction/UserRoleAdd.php
@@ -82,7 +82,7 @@ class UserRoleAdd extends RulesActionBase {
    * @return array
    *   An array of user roles keyed on role name.
    */
-  public function userRolesListOptions() {
+  public static function userRolesListOptions() {
     return user_role_names(TRUE);
   }
 
diff --git a/src/Plugin/RulesAction/UserRoleRemove.php b/src/Plugin/RulesAction/UserRoleRemove.php
index 17f532c..8207c59 100644
--- a/src/Plugin/RulesAction/UserRoleRemove.php
+++ b/src/Plugin/RulesAction/UserRoleRemove.php
@@ -79,7 +79,7 @@ class UserRoleRemove extends RulesActionBase {
    * @return array
    *   An array of user roles keyed on role name.
    */
-  public function userRolesListOptions() {
+  public static function userRolesListOptions() {
     return user_role_names(TRUE);
   }