diff --git a/composer.json b/composer.json
index 600e4049d..b33767a84 100644
--- a/composer.json
+++ b/composer.json
@@ -26,8 +26,7 @@
 		"ext-intl": "for script transliteration in Strings::webalize() and toAscii()",
 		"ext-mbstring": "to use Strings::lower() etc...",
 		"ext-xml": "to use Strings::length() etc. when mbstring is not available",
-		"ext-gd": "to use Image",
-		"https://nette.org/donate": "\u001b[1;37;42m Please consider supporting Nette via a donation \u001b[0m"
+		"ext-gd": "to use Image"
 	},
 	"conflict": {
 		"nette/nette": "<2.2"
diff --git a/src/Utils/Validators.php b/src/Utils/Validators.php
index e133ab097..92d7759ea 100644
--- a/src/Utils/Validators.php
+++ b/src/Utils/Validators.php
@@ -261,9 +261,22 @@ public static function isList($value)
 	 */
 	public static function isInRange($value, $range)
 	{
-		return $value !== NULL
-			&& (!isset($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 <= $range[1]));
+		if ($value === NULL || !(isset($range[0]) || isset($range[1]))) {
+			return FALSE;
+		}
+		$limit = isset($range[0]) ? $range[0] : $range[1];
+		if (is_string($limit)) {
+			$value = (string) $value;
+		} elseif ($limit instanceof \DateTimeInterface) {
+			if (!$value instanceof \DateTimeInterface) {
+				return FALSE;
+			}
+		} elseif (is_numeric($value)) {
+			$value *= 1;
+		} else {
+			return FALSE;
+		}
+		return (!isset($range[0]) || ($value >= $range[0])) && (!isset($range[1]) || ($value <= $range[1]));
 	}
 
 
diff --git a/tests/Utils/Validators.isInRange().phpt b/tests/Utils/Validators.isInRange().phpt
index a5885debe..662a4b7c8 100644
--- a/tests/Utils/Validators.isInRange().phpt
+++ b/tests/Utils/Validators.isInRange().phpt
@@ -28,6 +28,10 @@ Assert::true(Validators::isInRange(-1, ['', 2]));
 Assert::true(Validators::isInRange(1, [-1, NULL]));
 Assert::false(Validators::isInRange(1, [-1, '']));
 
+Assert::false(Validators::isInRange(0, [NULL, NULL]));
+Assert::false(Validators::isInRange('', [NULL, NULL]));
+Assert::false(Validators::isInRange(10, [NULL, NULL]));
+
 Assert::false(Validators::isInRange(NULL, [0, 1]));
 Assert::false(Validators::isInRange(NULL, ['0', 'b']));
 
@@ -42,3 +46,8 @@ Assert::false(Validators::isInRange('a', [NULL, 9]));
 Assert::true(Validators::isInRange('1', [NULL, 9]));
 Assert::false(Validators::isInRange(10, ['a', NULL]));
 Assert::true(Validators::isInRange(10, [NULL, 'a']));
+
+Assert::false(Validators::isInRange(new DateTimeImmutable('2017-04-26'), [new DateTime('2017-04-20'), new DateTime('2017-04-23')]));
+Assert::true(Validators::isInRange(new DateTimeImmutable('2017-04-26'), [new DateTime('2017-04-20'), new DateTime('2017-04-30')]));
+Assert::false(Validators::isInRange(new DateTimeImmutable('2017-04-26'), [10, NULL]));
+Assert::false(Validators::isInRange(new DateTimeImmutable('2017-04-26'), [NULL, 10]));