diff --git a/CHANGELOG.md b/CHANGELOG.md
index 782445e..c32b22c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](https://semver.org/).
 
+## 1.5.1
+
++ [#19](https://github.com/luyadev/yii-helpers/pull/19) Fixed issue with ordinal numbers.
+
 ## 1.5.0 (26. October 2023)
 
 + Added new `StringHelper::toYouTubeEmbed()` function to extract YouTube links into an Embed links.
diff --git a/src/helpers/StringHelper.php b/src/helpers/StringHelper.php
index fa18b90..e040520 100644
--- a/src/helpers/StringHelper.php
+++ b/src/helpers/StringHelper.php
@@ -173,6 +173,11 @@ public static function isFloat($value)
             return true;
         }
 
+        if (!is_array($value) && preg_match('/^\d+\.$/', $value)) {
+            // ordinal number of the form cardinal number followed by point, e.g. "24."
+            return false;
+        }
+
         return ($value == (string)(float) $value);
     }
 
diff --git a/tests/helpers/StringHelperTest.php b/tests/helpers/StringHelperTest.php
index 788da4a..6778ad4 100644
--- a/tests/helpers/StringHelperTest.php
+++ b/tests/helpers/StringHelperTest.php
@@ -38,6 +38,9 @@ public function testIsFloat()
         $this->assertTrue(StringHelper::isFloat('-1'));
         $float = 1.0;
         $this->assertTrue(StringHelper::isFloat($float));
+
+        $this->assertTrue(StringHelper::isFloat('.5'));
+        $this->assertFalse(StringHelper::isFloat('5.'));
         
         $this->assertFalse(StringHelper::isFloat('string'));
     }
@@ -53,6 +56,9 @@ public function testTypeCastNumeric()
         $this->assertSame(1.5, StringHelper::typeCastNumeric(1.5));
         $this->assertSame(-1, StringHelper::typeCastNumeric(-1));
         $this->assertSame(-1.5, StringHelper::typeCastNumeric(-1.5));
+
+        $this->assertSame(0.5, StringHelper::typeCastNumeric('.5'));
+        $this->assertSame('5.', StringHelper::typeCastNumeric('5.'));
         
         $this->assertSame(1, StringHelper::typeCastNumeric(true));
         $this->assertSame(0, StringHelper::typeCastNumeric(false));