diff --git a/allzweckmesser/scanner.py b/allzweckmesser/scanner.py
index 438d8182ef5c26af5ffda1dd1d080179af04e6d8..97ced9b6537d64edb4bef9956fa3fd67546b6a2b 100644
--- a/allzweckmesser/scanner.py
+++ b/allzweckmesser/scanner.py
@@ -239,7 +239,7 @@ 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)
 
@@ -254,7 +254,7 @@ 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)