diff --git a/psalm.xml b/psalm.xml
index 03be8a9..67ace92 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -7,7 +7,10 @@
         <directory name="src" />
     </projectFiles>
     <issueHandlers>
-        <RedundantCondition errorLevel="info" />
-        <RedundantConditionGivenDocblockType errorLevel="info" />
+        <MixedArgument errorLevel="info" />
+        <MixedArrayAccess errorLevel="info" />
+        <MoreSpecificImplementedParamType errorLevel="info" />
+        <RedundantCondition errorLevel="suppress" />
+        <RedundantConditionGivenDocblockType errorLevel="suppress" />
     </issueHandlers>
 </psalm>
diff --git a/src/AntiCSRF.php b/src/AntiCSRF.php
index a487c7c..58b9fe1 100644
--- a/src/AntiCSRF.php
+++ b/src/AntiCSRF.php
@@ -313,8 +313,8 @@ public function validateRequest(): bool
         }
 
         if (
-            !isset($this->post[$this->formIndex]) ||
-            !isset($this->post[$this->formToken])
+            empty($this->post[$this->formIndex]) ||
+            empty($this->post[$this->formToken])
         ) {
             // User must transmit a complete index/token pair
             return false;