diff --git a/buildbox/build-telegram.sh b/buildbox/build-telegram.sh
index 9ad61bb4da..9a31feed47 100644
--- a/buildbox/build-telegram.sh
+++ b/buildbox/build-telegram.sh
@@ -4,7 +4,7 @@ set -e
 
 BUILD_TELEGRAM_VERSION="1"
 
-MACOS_VERSION="10.15"
+MACOS_VERSION="11"
 XCODE_VERSION="12.5.1"
 GUEST_SHELL="bash"