diff --git a/src/ManticoreSearch/Client.php b/src/ManticoreSearch/Client.php
index 2a53987..173308f 100644
--- a/src/ManticoreSearch/Client.php
+++ b/src/ManticoreSearch/Client.php
@@ -414,7 +414,7 @@ public function getSettings(): Settings {
 	protected function fetchSettings(): Settings {
 		$resp = $this->sendRequest('SHOW SETTINGS');
 		/** @var array{0:array{columns:array<mixed>,data:array{Setting_name:string,Value:string}}} */
-		$data = (array)json_decode($resp->getBody(), true);
+		$data = (array)simdjson_decode($resp->getBody(), true);
 		$settings = new Vector();
 		foreach ($data[0]['data'] as ['Setting_name' => $key, 'Value' => $value]) {
 			// If the key is plugin_dir check env first and after choose
@@ -442,7 +442,7 @@ protected function fetchSettings(): Settings {
 		// Gather variables also
 		$resp = $this->sendRequest('SHOW VARIABLES');
 		/** @var array{0:array{columns:array<mixed>,data:array{Setting_name:string,Value:string}}} */
-		$data = (array)json_decode($resp->getBody(), true);
+		$data = (array)simdjson_decode($resp->getBody(), true);
 		foreach ($data[0]['data'] as ['Variable_name' => $key, 'Value' => $value]) {
 			$settings->push(
 				new Map(
diff --git a/src/Network/Request.php b/src/Network/Request.php
index 7b7bdf0..ce3a99e 100644
--- a/src/Network/Request.php
+++ b/src/Network/Request.php
@@ -19,6 +19,7 @@
 use Manticoresearch\Buddy\Core\ManticoreSearch\RequestFormat;
 use Manticoresearch\Buddy\Core\ManticoreSearch\Settings;
 use Manticoresearch\Buddy\Core\Tool\Buddy;
+use SimdJsonException;
 
 final class Request {
 	const PAYLOAD_FIELDS = [
@@ -81,6 +82,7 @@ public static function default(string $id = '0'): static {
 	 * @param string $id
 	 * @return static
 	 */
+
 	public static function fromString(string $data, string $id = '0'): static {
 		$self = new static;
 		$self->id = $id;
@@ -149,17 +151,21 @@ public static function validateOrFail(string $data): array {
 		if ($data === '') {
 			throw new InvalidNetworkRequestError('The payload is missing');
 		}
+		try {
+			$result = simdjson_decode($data, true, 512);
+			if (!is_array($result)) {
+				throw new InvalidNetworkRequestError('Invalid request payload is passed');
+			}
+		} catch (SimdJsonException) {
+			throw new InvalidNetworkRequestError('Failed to parse request payload');
+		}
+
 		/** @var array{
 		 * type:string,
 		 * error:array{message:string,body?:array{error:string}},
 		 * message:array{path_query:string,body:string},
 		 * version:int} $result
 		 */
-		$result = json_decode($data, true, 512, JSON_INVALID_UTF8_SUBSTITUTE);
-		if (!is_array($result)) {
-			throw new InvalidNetworkRequestError('Invalid request payload is passed');
-		}
-
 		return $result;
 	}
 
@@ -234,11 +240,11 @@ protected function parseOrFail(array $payload): static {
 		$this->path = $path;
 		$this->format = $format;
 		$this->endpointBundle = $endpointBundle;
-		$this->mySQLTool = static::detectMySQLTool($payload['message']['body']);
+		$this->mySQLTool = $format === RequestFormat::SQL ? static::detectMySQLTool($payload['message']['body']) : null;
 		$this->payload = (in_array($endpointBundle, [Endpoint::Elastic, Endpoint::Bulk]))
 			? trim($payload['message']['body'])
 			: static::removeComments($payload['message']['body']);
-		$this->command = strtok(strtolower($this->payload), ' ') ?: '';
+		$this->command = strtolower(strtok($this->payload, ' ') ?: '');
 		$this->error = $payload['error']['message'];
 		$this->errorBody = $payload['error']['body'] ?? [];
 		$this->version = match ($payload['version']) {
diff --git a/src/Network/Struct.php b/src/Network/Struct.php
index ac233e7..ec6ce36 100644
--- a/src/Network/Struct.php
+++ b/src/Network/Struct.php
@@ -111,9 +111,7 @@ public function addBigIntField(string $field): void {
 	 * @return bool
 	 */
 	public static function isValid(string $json): bool {
-		// TODO: replace with json_validate once we more to 8.3
-		$result = json_decode($json, true, static::JSON_DEPTH, static::JSON_FLAGS);
-		return !!$result;
+		return simdjson_is_valid($json, static::JSON_DEPTH);
 	}
 
 	/**
@@ -123,9 +121,10 @@ public static function isValid(string $json): bool {
 	 */
 	public static function fromJson(string $json): self {
 		/** @var array<TKey, TValue> */
-		$result = (array)json_decode($json, true, static::JSON_DEPTH, static::JSON_FLAGS);
+		$result = (array)simdjson_decode($json, true, static::JSON_DEPTH);
 		$bigIntFields = [];
 		if (static::hasBigInt($json)) {
+			// We need here to keep original json decode cuzit has bigIntFields
 			/** @var array<TKey, TValue> */
 			$modified = json_decode($json, true, static::JSON_DEPTH, static::JSON_FLAGS | JSON_BIGINT_AS_STRING);
 			static::traverseAndTrack($modified, $result, $bigIntFields);
diff --git a/src/Plugin/Pluggable.php b/src/Plugin/Pluggable.php
index 6912679..6032040 100644
--- a/src/Plugin/Pluggable.php
+++ b/src/Plugin/Pluggable.php
@@ -219,7 +219,7 @@ public function getList(): array {
 			return [];
 		}
 		/** @var array{require?:array<string,string>} $composerJson */
-		$composerJson = json_decode($composerContent, true);
+		$composerJson = simdjson_decode($composerContent, true);
 		if (!isset($composerJson['require'])) {
 			return [];
 		}
@@ -274,7 +274,7 @@ public function getClassNamespaceByFullName(string $name): string {
 			throw new Exception("Failed to get contents of composer.json for plugin: $name");
 		}
 
-		$composerJson = json_decode($composerContent, true);
+		$composerJson = simdjson_decode($composerContent, true);
 		if (!$composerJson) {
 			throw new Exception("Failed to decode contents of composer.json file for plugin: $name");
 		}
@@ -465,7 +465,7 @@ public function fetchLocalPlugins(): array {
 				throw new Exception("Failed to read composer file for plugin: $shortName");
 			}
 			/** @var array{name:?string} */
-			$composer = json_decode($composerContent, true);
+			$composer = simdjson_decode($composerContent, true);
 			if (!isset($composer['name'])) {
 				throw new Exception("Failed to detect local plugin name from file: $composerFile");
 			}
diff --git a/src/Tool/KeyboardLayout.php b/src/Tool/KeyboardLayout.php
index 47d7739..e3ec89c 100644
--- a/src/Tool/KeyboardLayout.php
+++ b/src/Tool/KeyboardLayout.php
@@ -156,7 +156,7 @@ protected static function getLangMap(): array {
 			}
 
 			/** @var array<string,array<string>> $langMap */
-			$langMap = json_decode($configContent, true);
+			$langMap = simdjson_decode($configContent, true);
 			if (!is_array($langMap)) {
 				throw new Exception("Invalid keyboard layout config file at '$configPath'");
 			}
diff --git a/src/Tool/SqlQueryParser.php b/src/Tool/SqlQueryParser.php
index 7f079c4..9f7e994 100644
--- a/src/Tool/SqlQueryParser.php
+++ b/src/Tool/SqlQueryParser.php
@@ -82,7 +82,6 @@ private static function getCreator(): PHPSQLCreator {
 	 * @throws GenericError
 	 */
 	public static function parse(string $payload, Closure $preProcessorCallback, mixed $args): ?array {
-
 		$result = (bool)call_user_func($preProcessorCallback, $args);
 		if ($result === false) {
 			return null;
diff --git a/test/BuddyCore/Network/RequestTest.php b/test/BuddyCore/Network/RequestTest.php
index 864c699..1de39c6 100644
--- a/test/BuddyCore/Network/RequestTest.php
+++ b/test/BuddyCore/Network/RequestTest.php
@@ -169,14 +169,19 @@ public function testManticoreQueryValidationFail(): void {
 		$this->assertEquals(InvalidNetworkRequestError::class, $exCls);
 		$this->assertEquals('The payload is missing', $exMsg);
 
-		$query = "Invalid query\nis passed\nagain";
+		$query = '"payload as a string"';
 		[$exCls, $exMsg] = self::getExceptionInfo(Request::class, 'fromString', [$query]);
 		$this->assertEquals(InvalidNetworkRequestError::class, $exCls);
 		$this->assertEquals('Invalid request payload is passed', $exMsg);
 
+		$query = "Invalid query\nis passed\nagain";
+		[$exCls, $exMsg] = self::getExceptionInfo(Request::class, 'fromString', [$query]);
+		$this->assertEquals(InvalidNetworkRequestError::class, $exCls);
+		$this->assertEquals('Failed to parse request payload', $exMsg);
+
 		$query = 'Query\nwith unvalid\n\n{"request_body"}';
 		[$exCls, $exMsg] = self::getExceptionInfo(Request::class, 'fromString', [$query]);
 		$this->assertEquals(InvalidNetworkRequestError::class, $exCls);
-		$this->assertEquals('Invalid request payload is passed', $exMsg);
+		$this->assertEquals('Failed to parse request payload', $exMsg);
 	}
 }
diff --git a/test/src/Trait/TestFunctionalTrait.php b/test/src/Trait/TestFunctionalTrait.php
index 06c30f5..2c17ca9 100644
--- a/test/src/Trait/TestFunctionalTrait.php
+++ b/test/src/Trait/TestFunctionalTrait.php
@@ -318,13 +318,13 @@ protected static function runHttpQuery(
 
 		/** @var array<int,array{error:string,data:array<int,array<string,string>>,total?:string,columns?:string}> $result */
 		$result = match ($path) {
-			'cli_json', 'sql', 'sql?mode=raw' => (array)json_decode(implode(PHP_EOL, $output), true),
+			'cli_json', 'sql', 'sql?mode=raw' => (array)simdjson_decode(implode(PHP_EOL, $output), true),
 			'cli' => [
 				['columns' => implode(PHP_EOL, $output), 'data' => [], 'error' => ''],
 			],
 			// assuming Elastic-like endpoint is passed
 			default => [
-				['data' => [(array)json_decode($output[0] ?? '{}', true)], 'error' => ''],
+				['data' => [(array)simdjson_decode($output[0] ?? '{}', true)], 'error' => ''],
 			],
 		};
 		print_r($output);
@@ -361,7 +361,7 @@ protected static function runHttpBuddyRequest(
 		$redirect = $redirectOutput ? '2>&1' : '';
 		exec("curl -s 127.0.0.1:$port -H 'Content-type: application/json' -d @$payloadFile $redirect", $output);
 		/** @var array{version:int,type:string,message:array<int,array{columns:array<string>,data:array<int,array<string,string>>}>} $result */
-		$result = (array)json_decode($output[0] ?? '{}', true);
+		$result = (array)simdjson_decode($output[0] ?? '{}', true);
 		return $result;
 	}