diff --git a/src/Entity/ActivityEntity.php b/src/Entity/ActivityEntity.php
index 2bff420..36846a6 100644
--- a/src/Entity/ActivityEntity.php
+++ b/src/Entity/ActivityEntity.php
@@ -4,6 +4,7 @@
 use App\Helper\StringGenerationHelper;
 use DateTime;
 use App\Enum\StatusEnum;
+use App\Exceptions\InvalidEnumKeyException;
 
 /**
  * Entity for activities
@@ -11,6 +12,14 @@
 class ActivityEntity
 {
 
+    /** @var Array List of valid status for an activity */
+    public const VALID_STATUS = [
+        StatusEnum::OPEN,
+        StatusEnum::IN_PROGRESS,
+        StatusEnum::WAITING,
+        StatusEnum::CLOSED,
+    ];
+
     /** @var string The unique identifier of the entity */
     protected $id = '';
 
@@ -185,7 +194,7 @@
     public function setRealEndDate(?DateTime $realEndDate): self
     {
         $this->realEndDate = $realEndDate;
-        
+
         return $this;
     }
 
@@ -232,6 +241,9 @@
      */
     public function setStatus(string $status): self
     {
+        if (!in_array($status, $this::VALID_STATUS)) {
+            throw new InvalidEnumKeyException();
+        }
         $this->status = $status;
 
         return $this;
diff --git a/src/Exception/InvalidEnumKeyException.php b/src/Exception/InvalidEnumKeyException.php
new file mode 100644
index 0000000..32f4cb6
--- /dev/null
+++ b/src/Exception/InvalidEnumKeyException.php
@@ -0,0 +1,11 @@
+<?php
+namespace App\Exceptions;
+
+use Exception;
+
+/**
+ * Exceptions thrown when invalid enum key is set
+ */
+class InvalidEnumKeyException extends Exception
+{
+}
\ No newline at end of file