diff --git a/betaflight_sim/CMakeLists.txt b/betaflight_sim/CMakeLists.txt
index ff7fd6f..6165543 100644
--- a/betaflight_sim/CMakeLists.txt
+++ b/betaflight_sim/CMakeLists.txt
@@ -15,7 +15,7 @@ externalproject_add(betaflight-firmware
   GIT_REPOSITORY
     https://github.com/betaflight/betaflight
   GIT_TAG
-    master
+    4.5-maintenance
   INSTALL_COMMAND
     mkdir -p ${CMAKE_INSTALL_PREFIX}/share/betaflight_sim/bin/ &&
     cp ./obj/main/betaflight_SITL.elf ${CMAKE_INSTALL_PREFIX}/share/betaflight_sim/bin/