diff --git a/Telegram/build/build.sh b/Telegram/build/build.sh
index 08bd287ad8..aa2dcc1ecf 100755
--- a/Telegram/build/build.sh
+++ b/Telegram/build/build.sh
@@ -327,7 +327,7 @@ if [ "$BuildTarget" == "mac" ] || [ "$BuildTarget" == "macstore" ]; then
 
     echo "Signing the application.."
     if [ "$BuildTarget" == "mac" ]; then
-      codesign --force --deep --timestamp --options runtime --sign "Developer ID Application: John Preston" "$ReleasePath/$BundleName" --entitlements "$HomePath/Telegram/Telegram.entitlements"
+      codesign --force --deep --timestamp --options runtime --sign "Developer ID Application: Telegram FZ-LLC (C67CF9S4VU)" "$ReleasePath/$BundleName" --entitlements "$HomePath/Telegram/Telegram.entitlements"
     elif [ "$BuildTarget" == "macstore" ]; then
       codesign --force --timestamp --options runtime --sign "3rd Party Mac Developer Application: Telegram FZ-LLC (C67CF9S4VU)" "$ReleasePath/$BundleName/Contents/Frameworks/Breakpad.framework/Versions/A/Resources/breakpadUtilities.dylib" --entitlements "$HomePath/Telegram/Breakpad.entitlements"
       codesign --force --deep --timestamp --options runtime --sign "3rd Party Mac Developer Application: Telegram FZ-LLC (C67CF9S4VU)" "$ReleasePath/$BundleName" --entitlements "$HomePath/Telegram/Telegram Lite.entitlements"
diff --git a/Telegram/build/updates.py b/Telegram/build/updates.py
index 7a05070e72..f6f701eda7 100644
--- a/Telegram/build/updates.py
+++ b/Telegram/build/updates.py
@@ -81,7 +81,7 @@ if building:
         if result != 0:
             finish(1, 'While stripping Telegram.')
 
-        result = subprocess.call('codesign --force --deep --timestamp --options runtime --sign "Developer ID Application: John Preston" Telegram.app --entitlements "../../Telegram/Telegram/Telegram.entitlements"', shell=True)
+        result = subprocess.call('codesign --force --deep --timestamp --options runtime --sign "Developer ID Application: Telegram FZ-LLC (C67CF9S4VU)" Telegram.app --entitlements "../../Telegram/Telegram/Telegram.entitlements"', shell=True)
         if result != 0:
             finish(1, 'While signing Telegram.')