diff --git a/Miscellaneous/BBR/BBR.sh b/Miscellaneous/BBR/BBR.sh
index 9641b48..18e5df5 100644
--- a/Miscellaneous/BBR/BBR.sh
+++ b/Miscellaneous/BBR/BBR.sh
@@ -6,8 +6,14 @@ cd $HOME
 ## This part of the script is modified from https://github.com/KozakaiAya/TCP_BBR
 apt-get -qqy install dkms
 apt-get -qqy install linux-headers-$(uname -r)
-wget https://raw.githubusercontent.com/jerry048/Seedbox-Components/main/Miscellaneous/BBR/5.10.0/tcp_bbrx.c
-kernel_ver=5.10.0
+distro_codename="$(source /etc/os-release && printf "%s" "${VERSION_CODENAME}")"
+if [[ $distro_codename = buster ]]; then
+    wget https://raw.githubusercontent.com/jerry048/Seedbox-Components/main/Miscellaneous/BBR/5.10.0/tcp_bbrx.c
+    kernel_ver=5.10.0
+else if [[ $distro_codename = bullseye ]] ; then
+    wget https://raw.githubusercontent.com/jerry048/Seedbox-Components/main/Miscellaneous/BBR/5.15.0/tcp_bbrx.c
+    kernel_ver=5.15.0
+fi
 algo=bbrx
 bbr_file=tcp_$algo
 bbr_src=$bbr_file.c