diff --git a/src/Annotation/ResourceFieldEnhancer.php b/src/Annotation/ResourceFieldEnhancer.php
index 4a32309..9a90350 100644
--- a/src/Annotation/ResourceFieldEnhancer.php
+++ b/src/Annotation/ResourceFieldEnhancer.php
@@ -47,4 +47,11 @@ class ResourceFieldEnhancer extends Plugin {
    */
   public $class;
 
+  /**
+   * The name of modules that are required for this Field Enhancer to be usable.
+   *
+   * @var array
+   */
+  public $dependencies;
+
 }
diff --git a/src/Plugin/ResourceFieldEnhancerManager.php b/src/Plugin/ResourceFieldEnhancerManager.php
index 91287c6..8c09e86 100644
--- a/src/Plugin/ResourceFieldEnhancerManager.php
+++ b/src/Plugin/ResourceFieldEnhancerManager.php
@@ -35,4 +35,27 @@ class ResourceFieldEnhancerManager extends DefaultPluginManager {
     $this->setCacheBackend($cache_backend, 'resource_field_enhancer_plugins');
   }
 
+  /**
+   * {@inheritDoc}
+   */
+  protected function alterDefinitions(&$definitions) {
+    // Loop through all definitions.
+    foreach ($definitions AS $definition_key => $definition_info) {
+      // Check to see if dependencies key is set.
+      if (!empty($definition_info['dependencies'])) {
+        $definition_dependencies = $definition_info['dependencies'];
+        // Loop through dependencies to confirm if enabled.
+        foreach ($definition_dependencies AS $dependency) {
+          // If dependency is not enabled removed from list of definitions.
+          if (!$this->moduleHandler->moduleExists($dependency)) {
+            unset($definitions[$definition_key]);
+            continue;
+          }
+        }
+      }
+    }
+
+    $this->moduleHandler->alter($this->alterHook, $definitions);
+  }
+
 }
diff --git a/src/Plugin/jsonapi/FieldEnhancer/DateTimeEnhancer.php b/src/Plugin/jsonapi/FieldEnhancer/DateTimeEnhancer.php
index 1875c9d..460a96f 100644
--- a/src/Plugin/jsonapi/FieldEnhancer/DateTimeEnhancer.php
+++ b/src/Plugin/jsonapi/FieldEnhancer/DateTimeEnhancer.php
@@ -12,7 +12,8 @@ use Shaper\Util\Context;
  * @ResourceFieldEnhancer(
  *   id = "date_time",
  *   label = @Translation("Date Time (Timestamp field)"),
- *   description = @Translation("Formats a date based the configured date format for timestamp fields.")
+ *   description = @Translation("Formats a date based the configured date format for timestamp fields."),
+ *   dependencies={"datetime"}
  * )
  */
 class DateTimeEnhancer extends DateTimeEnhancerBase {
diff --git a/src/Plugin/jsonapi/FieldEnhancer/DateTimeFromStringEnhancer.php b/src/Plugin/jsonapi/FieldEnhancer/DateTimeFromStringEnhancer.php
index 6d741c4..5ebbc5b 100644
--- a/src/Plugin/jsonapi/FieldEnhancer/DateTimeFromStringEnhancer.php
+++ b/src/Plugin/jsonapi/FieldEnhancer/DateTimeFromStringEnhancer.php
@@ -11,7 +11,8 @@ use Shaper\Util\Context;
  * @ResourceFieldEnhancer(
  *   id = "date_time_from_string",
  *   label = @Translation("Date Time (Date Time field)"),
- *   description = @Translation("Formats a date based the configured date format for date fields.")
+ *   description = @Translation("Formats a date based the configured date format for date fields."),
+ *   dependencies={"datetime"}
  * )
  */
 class DateTimeFromStringEnhancer extends DateTimeEnhancerBase {