diff --git a/pyvcc/__main__.py b/pyvcc/__main__.py
index 4df4fb2..a5158f7 100644
--- a/pyvcc/__main__.py
+++ b/pyvcc/__main__.py
@@ -6,7 +6,7 @@
 import sys
 import argparse
 import structlog
-from pyvc.cli import main, validate_args
+from pyvcc.cli import main, validate_args
 
 
 log = structlog.get_logger()
diff --git a/pyvcc/semver.py b/pyvcc/semver.py
index 2f815e8..a6f191a 100644
--- a/pyvcc/semver.py
+++ b/pyvcc/semver.py
@@ -1,7 +1,9 @@
-from enum import Enum, auto
+import re
 import sys
 import structlog
 
+from enum import Enum, auto
+
 # Python 3.11+ has Self in typing module
 if sys.version_info >= (3, 11):
     from typing import Self
@@ -94,14 +96,15 @@ def bump_type(cls, message: str) -> BumpEnum:
         message (str): commit message content
         """
 
+        regex = re.compile(r"[.*]?([a-z]*!?)(\(.*\))?:\s(.*)$")
         bump = BumpEnum.NO_BUMP
         head = message.split("\n")[0]
 
-        # TODO: regex?
-        parsed_head = head.split(":")
+        parsed_head = regex.search(head)
 
-        if len(parsed_head) > 1:
-            commit_type = parsed_head[0].strip().upper()
+        if parsed_head is not None:
+            commit_type = parsed_head.groups()[0].upper()
+            log.debug("trying bump", type=commit_type, message=head)
 
             if cls.is_breaking_change(commit_type, message):
                 bump = BumpEnum.MAJOR
@@ -112,7 +115,7 @@ def bump_type(cls, message: str) -> BumpEnum:
             else:
                 bump = BumpEnum.NO_BUMP
         else:
-            log.info("not in conventional commit spec", message=head)
+            log.error("not in conventional commit spec", message=head)
 
         return bump
 
diff --git a/tests/semver/test_bump_version.py b/tests/semver/test_bump_version.py
index aeb4662..41b0ed9 100644
--- a/tests/semver/test_bump_version.py
+++ b/tests/semver/test_bump_version.py
@@ -51,6 +51,20 @@ def test_no_bump_no_type(no_cc_simple_commit: tuple[str, str]):
     assert str(version) == "1.0.0"
 
 
+def test_bump_merge():
+    version = SemVer(1, 0, 0)
+    message = "Merged feat!(xyz): break"
+    version.bump_version(message)
+    assert str(version) == "2.0.0"
+
+
+def test_bump_merge2():
+    version = SemVer(1, 0, 0)
+    message = "Merged feat(xyz): break"
+    version.bump_version(message)
+    assert str(version) == "1.1.0"
+
+
 def test_bump_multiple():
     """patch -> minor -> major"""
     version = SemVer(0, 1, 0)
@@ -107,6 +121,26 @@ def test_bump_multiple4():
     assert str(version) == "0.2.0"
 
 
+def test_bump_multiple5():
+    """patch -> patch -> minor"""
+    version = SemVer(0, 1, 0)
+
+    version.bump_version("fix: Fix login bug")
+    assert str(version) == "0.1.1"
+
+    version.bump_version("fix: Fix logout bug")
+    assert str(version) == "0.1.2"
+
+    version.bump_version("Fix logout bug")
+    assert str(version) == "0.1.2"
+
+    version.bump_version("feat(asdf): Add new feature")
+    assert str(version) == "0.2.0"
+
+    version.bump_version("Merge feat!(asdf): break new feature")
+    assert str(version) == "1.0.0"
+
+
 def test_parse_semver_str():
     version = SemVer.semver_from_string("1.1.0")
     assert str(version) == "1.1.0"
diff --git a/uv.lock b/uv.lock
index a54691a..ee1420b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -355,9 +355,9 @@ wheels = [
 ]
 
 [[package]]
-name = "python-version-controller"
-version = "0.2.1"
-source = { virtual = "." }
+name = "pyvcc"
+version = "1.2.2"
+source = { editable = "." }
 dependencies = [
     { name = "pygit2" },
     { name = "structlog" },