diff --git a/src/DocBlock/StandardTagFactory.php b/src/DocBlock/StandardTagFactory.php
index 2ed5be5..7b348c7 100644
--- a/src/DocBlock/StandardTagFactory.php
+++ b/src/DocBlock/StandardTagFactory.php
@@ -68,7 +68,7 @@ use function trim;
 final class StandardTagFactory implements TagFactory
 {
     /** PCRE regular expression matching a tag name. */
-    public const REGEX_TAGNAME = '[\w\-\_\\\\]+';
+    public const REGEX_TAGNAME = '[\w\-\_\\\\:]+';
 
     /**
      * @var string[] An array with a tag as a key, and an
@@ -194,7 +194,7 @@ final class StandardTagFactory implements TagFactory
     private function extractTagParts(string $tagLine) : array
     {
         $matches = [];
-        if (!preg_match('/^@(' . self::REGEX_TAGNAME . ')((?:[\s\(\{:])\s*([^\s].*)|$)/us', $tagLine, $matches)) {
+        if (!preg_match('/^@(' . self::REGEX_TAGNAME . ')((?:[\s\(\{])\s*([^\s].*)|$)/us', $tagLine, $matches)) {
             throw new InvalidArgumentException(
                 'The tag "' . $tagLine . '" does not seem to be wellformed, please check it for errors'
             );
diff --git a/tests/unit/DocBlock/StandardTagFactoryTest.php b/tests/unit/DocBlock/StandardTagFactoryTest.php
index cd6b99a..8ca3e57 100644
--- a/tests/unit/DocBlock/StandardTagFactoryTest.php
+++ b/tests/unit/DocBlock/StandardTagFactoryTest.php
@@ -372,9 +372,14 @@ class StandardTagFactoryTest extends TestCase
                 '@tag',
             ],
             'tag specialization' => [
-                '@tag:some-spec',
-                'tag',
-                '@tag :some-spec',
+                '@tag:some-spec body',
+                'tag:some-spec',
+                '@tag:some-spec body',
+            ],
+            'tag specialization(a)' => [
+                '@tag:some-spec(body)',
+                'tag:some-spec',
+                '@tag:some-spec (body)',
             ],
             'tag with textual description' => [
                 '@tag some text',