diff --git a/src/HeaderSecurity.php b/src/HeaderSecurity.php
index d12486ae..b3495f49 100644
--- a/src/HeaderSecurity.php
+++ b/src/HeaderSecurity.php
@@ -148,16 +148,16 @@ public static function assertValid(mixed $value): void
      */
     public static function assertValidName(mixed $name): void
     {
-        if (! is_string($name)) {
+        if (! is_string($name) && ! is_numeric($name)) {
             throw new Exception\InvalidArgumentException(sprintf(
-                'Invalid header name type; expected string; received %s',
+                'Invalid header name type; expected string or numeric value; received %s',
                 is_object($name) ? $name::class : gettype($name)
             ));
         }
-        if (! preg_match('/^[a-zA-Z0-9\'`#$%&*+.^_|~!-]+$/D', $name)) {
+        if (! preg_match('/^[a-zA-Z0-9\'`#$%&*+.^_|~!-]+$/D', (string) $name)) {
             throw new Exception\InvalidArgumentException(sprintf(
                 '"%s" is not valid header name',
-                $name
+                (string) $name
             ));
         }
     }
diff --git a/test/HeaderSecurityTest.php b/test/HeaderSecurityTest.php
index ca7c49d9..53acf6ce 100644
--- a/test/HeaderSecurityTest.php
+++ b/test/HeaderSecurityTest.php
@@ -130,4 +130,21 @@ public function testAssertValidNameRaisesExceptionForInvalidName(string $value):
 
         HeaderSecurity::assertValidName($value);
     }
+
+    /** @psalm-return non-empty-array<non-empty-string, array{0: int|float}> */
+    public function provideValidNumericHeaderNameValues(): array
+    {
+        return [
+            'zero'       => [0],
+            'int'        => [1],
+            'zero-float' => [0.0],
+            'float'      => [1.1],
+        ];
+    }
+
+    /** @dataProvider provideValidNumericHeaderNameValues */
+    public function testAssertValidNameDoesNotRaiseExceptionForValidNumericValues(int|float $value): void
+    {
+        $this->assertNull(HeaderSecurity::assertValidName($value));
+    }
 }