diff --git a/src/Utils/Validators.php b/src/Utils/Validators.php
index a67661faa..54b5f986f 100644
--- a/src/Utils/Validators.php
+++ b/src/Utils/Validators.php
@@ -239,8 +239,8 @@ public static function isList($value): bool
 	public static function isInRange($value, array $range): bool
 	{
 		return $value !== NULL
-			&& (!isset($range[0]) || $range[0] === '' || $value >= $range[0])
-			&& (!isset($range[1]) || $range[1] === '' || $value <= $range[1]);
+			&& (!isset($range[0]) || (is_string($range[0]) ? (string) $value >= $range[0] : is_numeric($value) && $value * 1 >= $range[0]))
+			&& (!isset($range[1]) || (is_string($range[1]) ? (string) $value <= $range[1] : is_numeric($value) && $value * 1 <= $range[1]));
 	}
 
 
diff --git a/tests/Utils/Validators.isInRange().phpt b/tests/Utils/Validators.isInRange().phpt
index 53980d2fa..cb83ef593 100644
--- a/tests/Utils/Validators.isInRange().phpt
+++ b/tests/Utils/Validators.isInRange().phpt
@@ -28,7 +28,19 @@ Assert::true(Validators::isInRange(-1, [NULL, 2]));
 Assert::true(Validators::isInRange(-1, ['', 2]));
 
 Assert::true(Validators::isInRange(1, [-1, NULL]));
-Assert::true(Validators::isInRange(1, [-1, '']));
+Assert::false(Validators::isInRange(1, [-1, '']));
 
 Assert::false(Validators::isInRange(NULL, [0, 1]));
 Assert::false(Validators::isInRange(NULL, ['0', 'b']));
+
+Assert::true(Validators::isInRange('', ['', '']));
+Assert::true(Validators::isInRange('', ['', 'b']));
+Assert::false(Validators::isInRange('', ['a', 'b']));
+
+Assert::false(Validators::isInRange('', [0, 1]));
+Assert::false(Validators::isInRange('', [0, 1]));
+Assert::false(Validators::isInRange('a', [1, NULL]));
+Assert::false(Validators::isInRange('a', [NULL, 9]));
+Assert::true(Validators::isInRange('1', [NULL, 9]));
+Assert::false(Validators::isInRange(10, ['a', NULL]));
+Assert::false(Validators::isInRange(10, [NULL, 'a']));