diff --git a/mytonctrl/mytonctrl.py b/mytonctrl/mytonctrl.py
index ff12e510..7f321214 100755
--- a/mytonctrl/mytonctrl.py
+++ b/mytonctrl/mytonctrl.py
@@ -324,7 +324,7 @@ def check_git(input_args, default_repo, text, default_branch='master'):
 #end define
 
 def check_branch_exists(author, repo, branch):
-	if is_hex(branch):
+	if len(branch) >= 6 and is_hex(branch):
 		print('Hex name detected, skip branch existence check.')
 		return
 	url = f"https://github.com/{author}/{repo}.git"
diff --git a/mytonctrl/scripts/update.sh b/mytonctrl/scripts/update.sh
index 463d422c..8bd4ecd9 100644
--- a/mytonctrl/scripts/update.sh
+++ b/mytonctrl/scripts/update.sh
@@ -37,8 +37,8 @@ pip3 uninstall -y mytonctrl
 
 # Update code
 echo "https://github.com/${author}/${repo}.git -> ${branch}"
-git clone --branch ${branch} --recursive https://github.com/${author}/${repo}.git
-cd ${repo}
+git clone --recursive https://github.com/${author}/${repo}.git
+cd ${repo} && git checkout ${branch}
 pip3 install -U .
 
 systemctl daemon-reload