diff --git a/allzweckmesser/scanner.py b/allzweckmesser/scanner.py
index 9f61205469d7d2294d1754d93dcc3cde7043f2b6..f05b9e33253a3729326e8389ddb283169a568224 100644
--- a/allzweckmesser/scanner.py
+++ b/allzweckmesser/scanner.py
@@ -237,7 +237,7 @@ def get_syllables(reading):
 
 def muta_cum_liquida(verse):
     
-    mcl_regex = re.compile(r'[aeiouv](([bpsckgdt]|(qu)|(qv)),?\s?[lrmn])([aeiouv]|[.?!]|$)')
+    mcl_regex = re.compile(r'[aeiouv](([bpsckgdt]|(qu)|(qv)),?\s?[lrmn])([aeiouv]|[.?!]|$)', flags=re.IGNORECASE)
     if re.search(mcl_regex, verse.text):
         matches = re.finditer(mcl_regex, verse.text)
 
@@ -252,7 +252,7 @@ def muta_cum_liquida(verse):
 
 def positional_lengthening(verse):
     
-    pl_regex = re.compile(r'[aeiouv](((([bcdfgjklmnprstvwxz]|(qu)),?\s?){2,})|[xz])')
+    pl_regex = re.compile(r'[aeiouv](((([bcdfgjklmnprstvwxz]|(qu)),?\s?){2,})|[xz])', flags=re.IGNORECASE)
     if re.search(pl_regex, verse.text):
         matches = re.finditer(pl_regex, verse.text)