diff --git a/constants.py b/constants.py
index 81f0623..8dcbf48 100644
--- a/constants.py
+++ b/constants.py
@@ -38,3 +38,13 @@ UNICODE = {
     '⇒': r'\implies',
     '⇐': r'\impliedby'
 }
+
+UTF8_REPLACEMENTS = {
+        r'\"o': 'ö',
+        r'\"a': 'ä',
+        r'\"u': 'ü',
+        r'\"O': 'Ö',
+        r'\"A': 'Ä',
+        r'\"U': 'Ü',
+        r'\ss': 'ß',
+}
diff --git a/latex_legacy_converter.py b/latex_legacy_converter.py
index 34c0e50..0b1dfbc 100644
--- a/latex_legacy_converter.py
+++ b/latex_legacy_converter.py
@@ -2,6 +2,17 @@ from constants import *
 import re
 from pathlib import Path
 
+def migrate_old_utf8_escape(line:str):
+    for old, new in UTF8_REPLACEMENTS.items():
+        while True:
+            old = old.replace('\\', r'\\')
+            m = re.search(old, line)
+            if m is None:
+                break
+            else:
+                line = line[:m.start()] + new + line[m.end():]
+    return line
+
 
 def _migrate_lazy_math_alphabet(line: str, letters: str, short: str, alph: str):
     for letter in letters:
@@ -59,6 +70,7 @@ def optimize_line(line: str) -> str:
     line = migrate_lazy_math_alphabets(line)
     line = migrate_deprecated(line)
     line = replace_unicode(line)
+    line = migrate_old_utf8_escape(line)
     return line