diff --git a/src/Code/Converters/TxtConverter.php b/src/Code/Converters/TxtConverter.php
index defcaee..0684643 100644
--- a/src/Code/Converters/TxtConverter.php
+++ b/src/Code/Converters/TxtConverter.php
@@ -7,7 +7,7 @@
 
 class TxtConverter implements ConverterContract
 {
-    public static $time_regexp = '/(?:\d{2}[:;])(?:\d{1,2}[:;])(?:\d{1,2}[:;])\d{1,3}|(?:\d{1,2}[:;])?(?:\d{1,2}[:;])\d{1,3}(?:[.,]\d+)?(?!\d)|\d{1,5}[.,]\d{1,3}/';
+    public static $time_regexp = '/(?:\d{2}[:.])(?:\d{2}[:.])(?:\d{2}[:.])(?:\d{2,3})|(?:\d{2}[:;])(?:\d{1,2}[:;])(?:\d{1,2}[:;])\d{1,3}|(?:\d{1,2}[:;])?(?:\d{1,2}[:;])\d{1,3}(?:[.,]\d+)?(?!\d)|\d{1,5}[.,]\d{1,3}/';
     private static $any_letter_regex = '/\p{L}/u';
 
     public function canParseFileContent($file_content, $original_file_content)
@@ -335,6 +335,12 @@ public static function timeToInternal(string $time, $fps)
     {
         $time = trim($time);
         $time = str_replace(';', ':', $time);
+
+        $dot_count = substr_count($time, '.');
+        if ($dot_count === 3) {
+            $time = str_replace('.', ':', $time);
+        }
+
         $time_parts = explode(':', $time);
         $total_parts = count($time_parts);
 
diff --git a/tests/formats/TxtTest.php b/tests/formats/TxtTest.php
index a64c34d..6b16dcf 100644
--- a/tests/formats/TxtTest.php
+++ b/tests/formats/TxtTest.php
@@ -170,6 +170,13 @@ public function testTimestamps()
             (new Subtitles())->add(1103.474, 1152.99, ',Speaker 2,""So at any time"""')->getInternalFormat(),
             Subtitles::loadFromString('
 "00:18:23:46,00:19:12:96,Speaker 2,""So at any time"""
+')->getInternalFormat());
+
+        $this->assertInternalFormatsEqual(
+            (new Subtitles())->add(3723.16, 3724.16, 'g')->getInternalFormat(),
+            Subtitles::loadFromString('
+01.02.03.04
+g
 ')->getInternalFormat());
     }