diff --git a/lib/nntp/tiny/buffer.py b/lib/nntp/tiny/buffer.py
index 8814c6b..a089388 100644
--- a/lib/nntp/tiny/buffer.py
+++ b/lib/nntp/tiny/buffer.py
@@ -52,7 +52,7 @@ class LineBuffer():
 
         self.offset_o = end + 1
 
-        return str(ret, 'ascii')
+        return str(ret, 'utf-8')
 
     def readline(self, sock: socket.socket) -> str:
         if self.done:
diff --git a/lib/nntp/tiny/session.py b/lib/nntp/tiny/session.py
index 812b0a2..f44f8cd 100644
--- a/lib/nntp/tiny/session.py
+++ b/lib/nntp/tiny/session.py
@@ -109,7 +109,7 @@ class Session():
         return self.buf.readline(self.sock)
 
     def print(self, text: str, end: str="\r\n"):
-        return self.sock.send(bytes(text + end, 'ascii'))
+        return self.sock.send(bytes(text + end, 'utf-8'))
 
     def end(self):
         return self.print('.')