diff --git a/csv_metadata_quality/fix.py b/csv_metadata_quality/fix.py
index ae17f7e..59e0b14 100755
--- a/csv_metadata_quality/fix.py
+++ b/csv_metadata_quality/fix.py
@@ -441,6 +441,13 @@ def normalize_dois(field):
         pattern = re.compile(r"dx\.doi\.org")
         match = re.findall(pattern, new_value)
 
+        if match:
+            new_value = re.sub(pattern, "doi.org", new_value)
+
+        # Convert www.doi.org to doi.org
+        pattern = re.compile(r"www\.doi\.org")
+        match = re.findall(pattern, new_value)
+
         if match:
             new_value = re.sub(pattern, "doi.org", new_value)