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0b7eb60 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0346323..9aa152c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## v2.2.2(2026-01-05)
+
+### Fixed
+
+- Fix a bug in GFM alert block parsing where alert types were case-sensitive.
+- Fix GFM alert regex to disallow content on header line.
+
## v2.2.1(2025-10-13)
### Changed
diff --git a/marko/__init__.py b/marko/__init__.py
index 4aae580..a21e6dd 100644
--- a/marko/__init__.py
+++ b/marko/__init__.py
@@ -23,7 +23,7 @@ if TYPE_CHECKING:
from .block import Document
from .parser import ElementType
-__version__ = "2.2.1"
+__version__ = "2.2.2"
class SetupDone(Exception):
diff --git a/marko/ext/gfm/elements.py b/marko/ext/gfm/elements.py
index fa98289..2edcaeb 100644
--- a/marko/ext/gfm/elements.py
+++ b/marko/ext/gfm/elements.py
@@ -225,11 +225,13 @@ class Alert(block.Quote):
@classmethod
def match(cls, source):
- return source.expect_re(r" {,3}>\s*\[\!(WARNING|NOTE|TIP|IMPORTANT|CAUTION)\]")
+ return source.expect_re(
+ r"(?im) {,3}>\s*\[\!(WARNING|NOTE|TIP|IMPORTANT|CAUTION)\]\s*$"
+ )
@classmethod
def parse(cls, source):
- alert_type = source.match.group(1)
+ alert_type = source.match.group(1).upper()
source.next_line(require_prefix=False)
source.consume()
state = cls(alert_type)
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