diff --git a/composer.json b/composer.json
index 4fea646..b517199 100644
--- a/composer.json
+++ b/composer.json
@@ -30,5 +30,10 @@
             "Flagsmith\\": "src",
             "FlagsmithTest\\": "tests"
         }
+    },
+    "config": {
+        "allow-plugins": {
+            "php-http/discovery": true
+        }
     }
 }
diff --git a/src/Flagsmith.php b/src/Flagsmith.php
index 186a064..d73d04b 100644
--- a/src/Flagsmith.php
+++ b/src/Flagsmith.php
@@ -418,8 +418,9 @@ private function getIdentityFlagsFromApi(string $identifier, ?object $traits): F
     {
         try {
             $data = IdentitiesGenerator::generateIdentitiesData($identifier, $traits);
+            $cacheKey = IdentitiesGenerator::generateIdentitiesCacheKey($identifier, $traits);
             $apiFlags = $this->cachedCall(
-                'Global',
+                $cacheKey,
                 'POST',
                 $this->identities_url,
                 $data
diff --git a/src/Utils/IdentitiesGenerator.php b/src/Utils/IdentitiesGenerator.php
index 6b08d24..2285ec7 100644
--- a/src/Utils/IdentitiesGenerator.php
+++ b/src/Utils/IdentitiesGenerator.php
@@ -19,4 +19,10 @@ public static function generateIdentitiesData(string $identifier, ?object $trait
 
         return $identities;
     }
+
+    public static function generateIdentitiesCacheKey(string $identifier, ?object $traits)
+    {
+        $hashedTraits = $traits !== null ? '.'.sha1(serialize($traits)) : '';
+        return 'Identity.'.$identifier.$hashedTraits;
+    }
 }