diff --git a/Backend-libXML/Parser.py b/Backend-libXML/Parser.py
index 537f3d7..67ebfc1 100644
--- a/Backend-libXML/Parser.py
+++ b/Backend-libXML/Parser.py
@@ -25,18 +25,18 @@ def minimize(source: str) -> str:
     :param source: XML
     :return: minimized XML
     """
-    result = source
     
-    to_remove = ["   ", "  ", "\t", "\n"]
-    to_substitute = [(" <", "<"), ("> ", ">"), ("</ ", "</"), (" >", ">")]
+    prolog = ""
+    prolog_start = source.find("<?")
     
-    for chars in to_remove:
-        result = result.replace(chars, "")
+    if prolog_start != -1:
+        prolog_end = source.find("?>") + 2
+        prolog = source[prolog_start:prolog_end]
+        source = source[prolog_end: ]
     
-    for e in to_substitute:
-        result = result.replace(e[0], e[1])
-    
-    return result
+    parser = etree.XMLParser(remove_blank_text=True)
+    xml = etree.fromstring(source, parser=parser)
+    return prolog + etree.tostring(xml, pretty_print=False).decode()
 
 
 def xpath(source: str, xpath: str) -> str: