diff --git a/src/Client.php b/src/Client.php
index c6d2c91..93ea8ab 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -66,7 +66,7 @@ class Client
     public const COMMAND_END_SESSIONS = "endSessions";
     public const COMMAND_LIST_INDEXES = "listIndexes";
     public const COMMAND_COLLMOD = "collMod";
-
+    public const COMMAND_KILL_CURSORS = "killCursors";
     // Connection and performance settings
     private int $defaultMaxTimeMS = 30000; // 30 seconds default
 
@@ -97,6 +97,14 @@ class Client
     public const READ_PREFERENCE_SECONDARY_PREFERRED = 'secondaryPreferred';
     public const READ_PREFERENCE_NEAREST = 'nearest';
 
+    /**
+     *  Commands that do not support readConcern options
+     */
+    private array $readConcernNotSupportedCommands = [
+        self::COMMAND_GET_MORE,
+        self::COMMAND_KILL_CURSORS
+    ];
+
 
     /**
      * Authentication for connection
@@ -320,7 +328,15 @@ public function query(array $command, ?string $db = null): stdClass|array|int
 
         // CRITICAL: Remove readConcern from any non-first operation in a transaction
         // MongoDB will reject commands with readConcern that have txnNumber but not startTransaction
-        if (isset($command['txnNumber']) && !isset($command['startTransaction']) && isset($command['readConcern'])) {
+        // Or if the command is in the readConcernNotSupportedCommands array
+        if (
+            (
+                isset($command['txnNumber'])
+                && !isset($command['startTransaction'])
+                && isset($command['readConcern'])
+            )
+            || \in_array(array_key_first($command) ?? '', $this->readConcernNotSupportedCommands)
+        ) {
             unset($command['readConcern']);
         }
 
diff --git a/tests/TransactionTest.php b/tests/TransactionTest.php
index 1ae7643..b4cb651 100644
--- a/tests/TransactionTest.php
+++ b/tests/TransactionTest.php
@@ -162,7 +162,6 @@ public function testTransactionStateManagement()
             // Verify final state
             $finalState = $client->getSessionState($session);
             $this->assertEquals('committed', $finalState['state']);
-
         } finally {
             $client->endSessions([$session]);
         }
@@ -202,7 +201,6 @@ public function testTransactionAbort()
             // Verify document was not inserted (transaction rolled back)
             $found = $client->find('test_collection', ['name' => 'abort_test']);
             $this->assertEmpty($found->cursor->firstBatch);
-
         } finally {
             $client->endSessions([$session]);
         }
@@ -251,7 +249,6 @@ public function testWithTransactionHelper()
 
             $this->assertNotEmpty($found1->cursor->firstBatch);
             $this->assertNotEmpty($found2->cursor->firstBatch);
-
         } finally {
             $client->endSessions([$session]);
         }
@@ -343,7 +340,6 @@ public function testCRUDWithSessionAndConcerns()
             $this->assertEquals(1, $count);
 
             $client->commitTransaction($session);
-
         } finally {
             $client->endSessions([$session]);
         }