diff --git a/nibabel/nicom/ascconv.py b/nibabel/nicom/ascconv.py
index 8ec72fb3e..6d7243603 100644
--- a/nibabel/nicom/ascconv.py
+++ b/nibabel/nicom/ascconv.py
@@ -10,7 +10,7 @@
 
 ASCCONV_RE = re.compile(
     r'### ASCCONV BEGIN((?:\s*[^=\s]+=[^=\s]+)*) ###\n(.*?)\n### ASCCONV END ###',
-    flags=re.M | re.S,
+    flags=re.MULTILINE | re.DOTALL,
 )
 
 
diff --git a/pyproject.toml b/pyproject.toml
index becc93366..316abdeca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -119,6 +119,7 @@ select = [
     "B",
     "C4",
     "F",
+    "FURB",
     "I",
     "PLE",
     "Q",