diff --git a/Changelog b/Changelog
index be82864e2..e40420113 100644
--- a/Changelog
+++ b/Changelog
@@ -12,6 +12,7 @@
     - FEATURE: Added "Amount downloaded/left" columns to transfer list
     - FEATURE: Simplified proxy settings
     - FEATURE: Optimized and improved the peer country resolution code
+    - BUGFIX: Fix SOCKS5 proxy authentication in search engine(closes #680072)
     - COSMETIC: Replaced message box by on-screen notification for download errors
     - COSMETIC: Improved the torrent creation tool appearance
     - COSMETIC: Use country flags by Mark James (Thanks to Dmytro Pukha)
diff --git a/src/searchengine/nova/socks.py b/src/searchengine/nova/socks.py
index 7cc1bc34a..b7b7b7ccb 100644
--- a/src/searchengine/nova/socks.py
+++ b/src/searchengine/nova/socks.py
@@ -187,7 +187,7 @@ class socksocket(socket.socket):
 		elif chosenauth[1] == "\x02":
 			# Okay, we need to perform a basic username/password
 			# authentication.
-			self.sendall("\x01" + chr(len(self.__proxy[4])) + self.__proxy[4] + chr(len(self.proxy[5])) + self.__proxy[5])
+			self.sendall("\x01" + chr(len(self.__proxy[4])) + self.__proxy[4] + chr(len(self.__proxy[5])) + self.__proxy[5])
 			authstat = self.__recvall(2)
 			if authstat[0] != "\x01":
 				# Bad response
diff --git a/src/searchengine/searchengine.cpp b/src/searchengine/searchengine.cpp
index edc7e6018..63ad7def6 100644
--- a/src/searchengine/searchengine.cpp
+++ b/src/searchengine/searchengine.cpp
@@ -519,9 +519,11 @@ void SearchEngine::updateNova() {
   }
 
   filePath = search_dir.absoluteFilePath("socks.py");
-  if(!QFile::exists(filePath)) {
-    QFile::copy(":/nova/socks.py", filePath);
+  if(QFile::exists(filePath)){
+    misc::safeRemove(filePath);
+    misc::safeRemove(filePath+"c");
   }
+  QFile::copy(":/nova/socks.py", filePath);
   QDir destDir(QDir(misc::searchEngineLocation()).absoluteFilePath("engines"));
   QDir shipped_subDir(":/nova/engines/");
   QStringList files = shipped_subDir.entryList();