diff --git a/php/src/vaas/Message/BaseVerdictRequest.php b/php/src/vaas/Message/BaseVerdictRequest.php
index 30b4c738..23ece8be 100644
--- a/php/src/vaas/Message/BaseVerdictRequest.php
+++ b/php/src/vaas/Message/BaseVerdictRequest.php
@@ -8,8 +8,8 @@ class BaseVerdictRequest extends BaseMessage
 {
     public string $guid;
     public string $session_id;
-    public bool $UseHashLookup;
-    public bool $UseCache;
+    public bool $use_hash_lookup;
+    public bool $use_cache;
 
     public function __construct(kind $kind, string $uuid = null, string $SessionId)
     {
diff --git a/php/src/vaas/Vaas.php b/php/src/vaas/Vaas.php
index a6616b6c..ac99a886 100644
--- a/php/src/vaas/Vaas.php
+++ b/php/src/vaas/Vaas.php
@@ -401,8 +401,8 @@ private function _verdictResponseForSha256(Sha256 $sha256, string $uuid = null):
         $websocket = $this->_vaasConnection->GetAuthenticatedWebsocket();
 
         $request = new VerdictRequest(strtolower($sha256), $uuid, $this->_vaasConnection->SessionId);
-        $request->UseCache = $this->_options->UseCache;
-        $request->UseHashLookup = $this->_options->UseHashLookup;
+        $request->use_cache = $this->_options->UseCache;
+        $request->use_hash_lookup = $this->_options->UseHashLookup;
         $websocket->send(json_encode($request));
 
         if ($this->_logger != null)
@@ -427,8 +427,8 @@ private function _verdictResponseForUrl(string $url, string $uuid = null): Verdi
         $websocket = $this->_vaasConnection->GetAuthenticatedWebsocket();
 
         $request = new VerdictRequestForUrl($url, $uuid, $this->_vaasConnection->SessionId);
-        $request->UseCache = $this->_options->UseCache;
-        $request->UseHashLookup = $this->_options->UseHashLookup;
+        $request->use_cache = $this->_options->UseCache;
+        $request->use_hash_lookup = $this->_options->UseHashLookup;
         $websocket->send(json_encode($request));
 
         if ($this->_logger != null)
@@ -456,8 +456,8 @@ private function _verdictResponseForStream(string $uuid = null): VerdictResponse
         $websocket = $this->_vaasConnection->GetAuthenticatedWebsocket();
 
         $request = new VerdictRequestForStream($this->_vaasConnection->SessionId, $uuid);
-        $request->UseCache = $this->_options->UseCache;
-        $request->UseHashLookup = $this->_options->UseHashLookup;
+        $request->use_cache = $this->_options->UseCache;
+        $request->use_hash_lookup = $this->_options->UseHashLookup;
         $websocket->send(json_encode($request));
 
         if ($this->_logger != null)
diff --git a/php/tests/vaas/ProtocolTest.php b/php/tests/vaas/ProtocolTest.php
index fdefe698..439dd664 100644
--- a/php/tests/vaas/ProtocolTest.php
+++ b/php/tests/vaas/ProtocolTest.php
@@ -57,4 +57,21 @@ public function testForSha256CallBeforeConnection_ThrowsVaasInvalidStateExceptio
         $vaas = new Vaas("url");
         $vaas->ForSha256("000005c43196142f01d615a67b7da8a53cb0172f8e9317a2ec9a0a39a1da6fe8");
     }
+
+    public function testVerdictRequestSerializationTest(): void
+    {
+        $verdictRequest = new \VaasSdk\Message\VerdictRequest(
+            "000005c43196142f01d615a67b7da8a53cb0172f8e9317a2ec9a0a39a1da6fe8",
+            "guid",
+            "sessionid"
+        );
+        $verdictRequest->use_cache = false;
+        $verdictRequest->use_hash_lookup = false;
+
+        $string = json_encode($verdictRequest);
+        $this->assertEquals(
+            '{"kind":"VerdictRequest","guid":"guid","session_id":"sessionid","use_hash_lookup":false,"use_cache":false,"sha256":"000005c43196142f01d615a67b7da8a53cb0172f8e9317a2ec9a0a39a1da6fe8"}',
+            $string
+        );
+    }
 }
diff --git a/php/tests/vaas/VaasTest.php b/php/tests/vaas/VaasTest.php
index 85139188..61a369e2 100644
--- a/php/tests/vaas/VaasTest.php
+++ b/php/tests/vaas/VaasTest.php
@@ -64,9 +64,9 @@ public function setUp(): void
         }
     }
 
-    private function _getVaas(): Vaas
+    private function _getVaas(bool $useCache = false, bool $useHashLookup = true): Vaas
     {
-        return new Vaas($_ENV["VAAS_URL"], $this->_getDebugLogger(), new VaasOptions(false, false));
+        return new Vaas($_ENV["VAAS_URL"], $this->_getDebugLogger(), new VaasOptions($useCache, $useHashLookup));
     }
 
     private function _getDebugLogger(): LoggerInterface