diff --git a/scripts/patch.py b/scripts/patch.py
index e4187d5..38d9016 100644
--- a/scripts/patch.py
+++ b/scripts/patch.py
@@ -1,5 +1,6 @@
 import re
 import os
+import plist_patch as plist
 
 def RewriteFile(file_to_rewrite, content):
 	file_to_rewrite.seek(0)
@@ -24,14 +25,8 @@ def PatchInfoPlist(build_config):
 	sln_dir = os.path.dirname(build_config['sln_path'])
 	abs_info_plist_path = os.path.join(sln_dir, build_config['info_plist_rel_path'])
 
-	info_plist_file = open(abs_info_plist_path, 'r+')
-	content = info_plist_file.read()
-
-	version_patt = r'\s*<key>CFBundleVersion</key>\s+<string>[\d\.]+</string>'
-	version_node = r'\n\t<key>CFBundleVersion</key>\n\t<string>{0}</string>'.format(build_config['version'])
-	content = re.sub(version_patt, version_node, content)
-
-	RewriteFile(info_plist_file, content)
+	key_values = {'CFBundleVersion' : build_config['version']}
+	plist.AppendOrReplace(key_values, abs_info_plist_path)
 
 def PathcIos(build_config):
 
diff --git a/scripts/plist_patch.py b/scripts/plist_patch.py
new file mode 100644
index 0000000..b034937
--- /dev/null
+++ b/scripts/plist_patch.py
@@ -0,0 +1,49 @@
+import xml.etree.ElementTree as ET
+
+def AppendKeyValue(key_name, value, dict_element):
+	key_element = ET.Element('key')
+	key_element.text = key_name
+
+	value_element = ET.Element('string')
+	value_element.text = value
+
+	dict_element.append(key_element)
+	dict_element.append(value_element)
+
+def ReplaceValueByKeyIndex(key_element_index, value, dict_element):
+	value_index = key_element_index + 1
+	value_element = dict_element[value_index]
+	value_element.text = value
+
+def FindIndexByKey(key_name, dict_element):
+	all_keys_elements = dict_element.findall('key')
+
+	is_exists = False
+	index = 0
+
+	for e in all_keys_elements:
+		if e.text == key_name:
+			is_exists = True
+			break
+		index += 1
+
+	element_index = index * 2
+	return element_index if is_exists else -1
+
+def AppendOrReplaceValueByKey(key_name, value, dict_element):
+	key_index = FindIndexByKey(key_name, dict_element)
+	element_exists = key_index >= 0
+
+	if element_exists:
+		ReplaceValueByKeyIndex(key_index, value, dict_element)
+	else:
+		AppendKeyValue(key_name, value, dict_element)
+
+def AppendOrReplace(key_value_dict, abs_plist_path):
+	tree = ET.parse(abs_plist_path)
+	plist_dict = tree.getroot().find('dict')
+
+	for key_name in key_value_dict:
+		AppendOrReplaceValueByKey(key_name, key_value_dict[key_name], plist_dict)
+
+	tree.write(abs_plist_path)
\ No newline at end of file