diff --git a/src/Dibi/DataSource.php b/src/Dibi/DataSource.php
index bcfc7caf..7951de8e 100644
--- a/src/Dibi/DataSource.php
+++ b/src/Dibi/DataSource.php
@@ -260,9 +260,9 @@ FROM %SQL', $this->sql, '
 	{
 		if ($this->count === null) {
 			$this->count = $this->conds || $this->offset || $this->limit
-				? (int) $this->connection->nativeQuery(
+				? Helpers::intVal($this->connection->nativeQuery(
 					'SELECT COUNT(*) FROM (' . $this->__toString() . ') t'
-				)->fetchSingle()
+				)->fetchSingle())
 				: $this->getTotalCount();
 		}
 		return $this->count;
@@ -275,9 +275,9 @@ FROM %SQL', $this->sql, '
 	public function getTotalCount(): int
 	{
 		if ($this->totalCount === null) {
-			$this->totalCount = (int) $this->connection->nativeQuery(
+			$this->totalCount = Helpers::intVal($this->connection->nativeQuery(
 				'SELECT COUNT(*) FROM ' . $this->sql
-			)->fetchSingle();
+			)->fetchSingle());
 		}
 		return $this->totalCount;
 	}
diff --git a/src/Dibi/Drivers/MsSqlReflector.php b/src/Dibi/Drivers/MsSqlReflector.php
index 5d819da9..a04964b5 100644
--- a/src/Dibi/Drivers/MsSqlReflector.php
+++ b/src/Dibi/Drivers/MsSqlReflector.php
@@ -68,12 +68,12 @@ class MsSqlReflector implements Dibi\Reflector
 		if (!is_array($row) || count($row) < 1) {
 			if ($fallback) {
 				$row = $this->driver->query("SELECT COUNT(*) FROM {$this->driver->escapeIdentifier($table)}")->fetch(false);
-				$count = (int) ($row[0]);
+				$count = Dibi\Helpers::intVal($row[0]);
 			} else {
 				$count = null;
 			}
 		} else {
-			$count = (int) ($row[0]);
+			$count = Dibi\Helpers::intVal($row[0]);
 		}
 
 		return $count;
diff --git a/src/Dibi/Drivers/OracleDriver.php b/src/Dibi/Drivers/OracleDriver.php
index 8eb26647..8b3d5a0d 100644
--- a/src/Dibi/Drivers/OracleDriver.php
+++ b/src/Dibi/Drivers/OracleDriver.php
@@ -159,7 +159,7 @@ class OracleDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 	public function getInsertId(?string $sequence): ?int
 	{
 		$row = $this->query("SELECT $sequence.CURRVAL AS ID FROM DUAL")->fetch(true);
-		return isset($row['ID']) ? (int) $row['ID'] : null;
+		return isset($row['ID']) ? Dibi\Helpers::intVal($row['ID']) : null;
 	}
 
 
diff --git a/src/Dibi/Drivers/SqlsrvDriver.php b/src/Dibi/Drivers/SqlsrvDriver.php
index d30f81d3..23f6ad08 100644
--- a/src/Dibi/Drivers/SqlsrvDriver.php
+++ b/src/Dibi/Drivers/SqlsrvDriver.php
@@ -139,7 +139,7 @@ class SqlsrvDriver implements Dibi\Driver, Dibi\ResultDriver
 		$res = sqlsrv_query($this->connection, 'SELECT SCOPE_IDENTITY()');
 		if (is_resource($res)) {
 			$row = sqlsrv_fetch_array($res, SQLSRV_FETCH_NUMERIC);
-			return (int) $row[0];
+			return Dibi\Helpers::intVal($row[0]);
 		}
 		return null;
 	}
diff --git a/src/Dibi/Fluent.php b/src/Dibi/Fluent.php
index 52c78145..f05db1be 100644
--- a/src/Dibi/Fluent.php
+++ b/src/Dibi/Fluent.php
@@ -378,9 +378,9 @@ class Fluent implements IDataSource
 
 	public function count(): int
 	{
-		return (int) $this->query([
+		return Helpers::intVal($this->query([
 			'SELECT COUNT(*) FROM (%ex', $this->_export(), ') [data]',
-		])->fetchSingle();
+		])->fetchSingle());
 	}
 
 
diff --git a/src/Dibi/Helpers.php b/src/Dibi/Helpers.php
index 67774c1c..e13dcaef 100644
--- a/src/Dibi/Helpers.php
+++ b/src/Dibi/Helpers.php
@@ -285,4 +285,23 @@ class Helpers
 	{
 		return $val === false ? null : $val;
 	}
+
+
+	/**
+	 * @internal
+	 * @return string|int
+	 */
+	public static function intVal($value): int
+	{
+		if (is_int($value)) {
+			return $value;
+		} elseif (is_string($value) && preg_match('#-?\d++\z#A', $value)) {
+			if (is_float($value * 1)) {
+				throw new Exception("Number $value is greater than integer.");
+			}
+			return (int) $value;
+		} else {
+			throw new Exception("Expected number, '$value' given.");
+		}
+	}
 }
diff --git a/src/Dibi/Translator.php b/src/Dibi/Translator.php
index e9566426..00dcb9a1 100644
--- a/src/Dibi/Translator.php
+++ b/src/Dibi/Translator.php
@@ -536,7 +536,7 @@ final class Translator
 				} elseif ($this->comment) {
 					return "(limit $arg)";
 				} else {
-					$this->limit = (int) $arg;
+					$this->limit = Helpers::intVal($arg);
 				}
 				return '';
 
@@ -546,7 +546,7 @@ final class Translator
 				} elseif ($this->comment) {
 					return "(offset $arg)";
 				} else {
-					$this->offset = (int) $arg;
+					$this->offset = Helpers::intVal($arg);
 				}
 				return '';
 
diff --git a/tests/dibi/Fluent.select.phpt b/tests/dibi/Fluent.select.phpt
index 78f24bd8..723cc2cb 100644
--- a/tests/dibi/Fluent.select.phpt
+++ b/tests/dibi/Fluent.select.phpt
@@ -144,10 +144,9 @@ if ($config['system'] === 'mysql') {
 		->limit(' 1; DROP TABLE users')
 		->offset(' 1; DROP TABLE users');
 
-	Assert::same(
-		reformat('  SELECT * LIMIT 1 OFFSET 1'),
-		(string) $fluent
-	);
+	Assert::error(function () use ($fluent) {
+		(string) $fluent;
+	}, E_USER_ERROR, "Expected number, ' 1; DROP TABLE users' given.");
 }
 
 
diff --git a/tests/dibi/Helpers.intVal().phpt b/tests/dibi/Helpers.intVal().phpt
new file mode 100644
index 00000000..d9498f88
--- /dev/null
+++ b/tests/dibi/Helpers.intVal().phpt
@@ -0,0 +1,32 @@
+<?php
+declare(strict_types=1);
+
+use Dibi\Helpers;
+use Tester\Assert;
+
+require __DIR__ . '/bootstrap.php';
+
+
+Assert::same(0, Helpers::intVal(0));
+Assert::same(0, Helpers::intVal('0'));
+Assert::same(-10, Helpers::intVal('-10'));
+
+Assert::exception(function () {
+	Helpers::intVal('12345678901234567890123456879');
+}, Dibi\Exception::class, 'Number 12345678901234567890123456879 is greater than integer.');
+
+Assert::exception(function () {
+	Helpers::intVal('-12345678901234567890123456879');
+}, Dibi\Exception::class, 'Number -12345678901234567890123456879 is greater than integer.');
+
+Assert::exception(function () {
+	Helpers::intVal('');
+}, Dibi\Exception::class, "Expected number, '' given.");
+
+Assert::exception(function () {
+	Helpers::intVal('not number');
+}, Dibi\Exception::class, "Expected number, 'not number' given.");
+
+Assert::exception(function () {
+	Helpers::intVal(null);
+}, Dibi\Exception::class, "Expected number, '' given.");