diff --git a/src/common/socks5.py b/src/common/socks5.py
index 00388502f..e4fbdfb4c 100644
--- a/src/common/socks5.py
+++ b/src/common/socks5.py
@@ -875,9 +875,9 @@ class Socks5:
         Get sha of sid + Initiator jid + Target jid
         """
         if self.file_props.is_a_proxy:
-            return hashlib.sha1('%s%s%s' % (self.sid,
-                self.file_props.proxy_sender, self.file_props.proxy_receiver)
-                ).hexdigest()
+            return hashlib.sha1(('%s%s%s' % (self.sid,
+                self.file_props.proxy_sender, self.file_props.proxy_receiver)).\
+                encode('utf-8')).hexdigest()
         return hashlib.sha1(('%s%s%s' % (self.sid, self.initiator,
             self.target)).encode('utf-8')).hexdigest()