diff --git a/setup.py b/setup.py
index 78336b4..6cb3a3c 100755
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 from setuptools.command.test import test as TestCommand
 
 
-version = '0.8'
+version = '0.9'
 
 
 def read(*parts):
@@ -78,6 +78,8 @@ def read(*parts):
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Programming Language :: Python :: Implementation :: CPython',
     ],
diff --git a/src/markey/underscore.py b/src/markey/underscore.py
index 9535e27..0e21e7a 100644
--- a/src/markey/underscore.py
+++ b/src/markey/underscore.py
@@ -47,8 +47,8 @@
     'function_call': ruleset(
         rule(',', 'func_argument_delimiter'),
         rule('\s+', None),
-        rule(r"('([^'\\]*(?:\\.[^'\\]*)*)'|"
-             r'"([^"\\]*(?:\\.[^"\\]*)*)")(?s)', 'func_string_arg'),
+        rule(r"(?s)('([^'\\]*(?:\\.[^'\\]*)*)'|"
+             r'"([^"\\]*(?:\\.[^"\\]*)*)")', 'func_string_arg'),
         rule(r'([\w_]+)\s*=', bygroups('func_kwarg'))
     )
 }