diff --git a/routeros_api/api_structure.py b/routeros_api/api_structure.py
index 7899956..2cd7c5f 100644
--- a/routeros_api/api_structure.py
+++ b/routeros_api/api_structure.py
@@ -28,7 +28,7 @@ def get_mikrotik_value(self, string):
         return string.encode()
 
     def get_python_value(self, bytes):
-        return bytes.decode()
+        return bytes.decode('latin-1')
 
 
 class BytesField(Field):
@@ -53,7 +53,7 @@ def get_mikrotik_value(self, number):
         return str(number).encode()
 
     def get_python_value(self, bytes):
-        return int(bytes.decode())
+        return int(bytes.decode('latin-1'))
 
 
 class TimedeltaField(Field):
@@ -68,7 +68,7 @@ def get_python_value(self, bytes):
         if bytes == b'none':
             return None
         else:
-            return self.parse_mikrotik_timedelta(bytes.decode())
+            return self.parse_mikrotik_timedelta(bytes.decode('latin-1'))
 
     def parse_mikrotik_timedelta(self, time_string):
         new_timedelta_format = (
@@ -100,7 +100,7 @@ def get_mikrotik_value(self, ip_network):
 
     def get_python_value(self, bytes):
         if bytes:
-            return ipaddress.ip_network(bytes.decode())
+            return ipaddress.ip_network(bytes.decode('latin-1'))
         else:
             return None
 
diff --git a/routeros_api/sentence.py b/routeros_api/sentence.py
index a146910..43ae6b8 100644
--- a/routeros_api/sentence.py
+++ b/routeros_api/sentence.py
@@ -56,7 +56,10 @@ def __init__(self, path, command, tag=None):
     def get_api_format(self):
         formated = [self.path + self.command]
         for key, value in self.attributes.items():
-            formated.append(b'=' + key + b'=' + value)
+            try:
+                formated.append(b'=' + key + b'=' + value)
+            except:
+                formated.append(b'=' + key + b'=' + value.encode())                                
         for query in self.queries:
             formated.extend(query.get_api_format())
         if self.tag is not None: