diff --git a/PowerEditor/bin/updater/GUP.exe b/PowerEditor/bin/updater/GUP.exe
index a0b70a20..d0de5f8e 100755
Binary files a/PowerEditor/bin/updater/GUP.exe and b/PowerEditor/bin/updater/GUP.exe differ
diff --git a/PowerEditor/bin/updater/libcurl.dll b/PowerEditor/bin/updater/libcurl.dll
index 740b97c3..ee21eb79 100644
Binary files a/PowerEditor/bin/updater/libcurl.dll and b/PowerEditor/bin/updater/libcurl.dll differ
diff --git a/PowerEditor/src/NppCommands.cpp b/PowerEditor/src/NppCommands.cpp
index 5ef10400..a1227178 100644
--- a/PowerEditor/src/NppCommands.cpp
+++ b/PowerEditor/src/NppCommands.cpp
@@ -2618,12 +2618,21 @@ void Notepad_plus::command(int id)
 				generic_string updaterFullPath = updaterDir;
 				PathAppend(updaterFullPath, TEXT("gup.exe"));
 
-				generic_string param = TEXT("-verbose -v");
-				param += VERSION_VALUE;
-
+				generic_string param;
 				if (id == IDM_CONFUPDATERPROXY)
+				{
 					param = TEXT("-options");
+				}
+				else
+				{
+					param = TEXT("-verbose -v");
+					param += VERSION_VALUE;
 
+					if (NppParameters::getInstance()->isx64())
+					{
+						param += TEXT(" -px64");
+					}
+				}
 				Process updater(updaterFullPath.c_str(), param.c_str(), updaterDir.c_str());
 
 				updater.run();
diff --git a/PowerEditor/src/winmain.cpp b/PowerEditor/src/winmain.cpp
index c3150e52..95c8e665 100644
--- a/PowerEditor/src/winmain.cpp
+++ b/PowerEditor/src/winmain.cpp
@@ -418,8 +418,8 @@ DEVOMER*/
 
 	generic_string updaterFullPath = updaterDir + TEXT("gup.exe");
 
-	generic_string version = TEXT("-v");
-	version += VERSION_VALUE;
+	generic_string updaterParams = TEXT("-v");
+	updaterParams += VERSION_VALUE;
 
 	bool isUpExist = nppGui._doesExistUpdater = (::PathFileExists(updaterFullPath.c_str()) == TRUE);
 
@@ -438,7 +438,11 @@ DEVOMER*/
 	bool isGtXP = ver > WV_XP;
 	if (TheFirstOne && isUpExist && doUpdate && isGtXP)
 	{
-		Process updater(updaterFullPath.c_str(), version.c_str(), updaterDir.c_str());
+		if (pNppParameters->isx64())
+		{
+			updaterParams += TEXT(" -px64");
+		}
+		Process updater(updaterFullPath.c_str(), updaterParams.c_str(), updaterDir.c_str());
 		updater.run();
 
         // Update next update date