diff --git a/src/Http/Request.php b/src/Http/Request.php
index bc3da98..4d0e3a0 100755
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -712,7 +712,9 @@ protected function parseRange(): ?array
             $data['end'] = (int) $ranges[1];
         }
 
-        if ($data['end'] !== null && $data['start'] >= $data['end']) {
+        // RFC 9110 range bounds are inclusive, so start === end is a valid
+        // single-byte range (`bytes=0-0`, or the final byte of a file).
+        if ($data['end'] !== null && $data['start'] > $data['end']) {
             return null;
         }
 
diff --git a/tests/RequestTest.php b/tests/RequestTest.php
index 3142163..83ee138 100755
--- a/tests/RequestTest.php
+++ b/tests/RequestTest.php
@@ -340,6 +340,26 @@ public function testCanGetRange(): void
         $this->assertSame(0, $this->request->getRangeStart());
         $this->assertNull($this->request->getRangeEnd());
 
+        // RFC 9110 bounds are inclusive: start === end is a valid single-byte range.
+        $_SERVER['HTTP_RANGE'] = 'bytes=0-0';
+        $this->request = new Request();
+        $this->assertSame('bytes', $this->request->getRangeUnit());
+        $this->assertSame(0, $this->request->getRangeStart());
+        $this->assertSame(0, $this->request->getRangeEnd());
+
+        $_SERVER['HTTP_RANGE'] = 'bytes=499-499';
+        $this->request = new Request();
+        $this->assertSame('bytes', $this->request->getRangeUnit());
+        $this->assertSame(499, $this->request->getRangeStart());
+        $this->assertSame(499, $this->request->getRangeEnd());
+
+        // Start past end is still invalid.
+        $_SERVER['HTTP_RANGE'] = 'bytes=5-4';
+        $this->request = new Request();
+        $this->assertNull($this->request->getRangeUnit());
+        $this->assertNull($this->request->getRangeStart());
+        $this->assertNull($this->request->getRangeEnd());
+
         $_SERVER['HTTP_RANGE'] = 'bytes=0--499';
         $this->request = new Request();
         $this->assertNull($this->request->getRangeUnit());