diff --git a/bench/utils.py b/bench/utils.py
index d6386c74..8d83f208 100644
--- a/bench/utils.py
+++ b/bench/utils.py
@@ -508,6 +508,9 @@ def pre_upgrade(from_ver, to_ver, bench='.'):
 			if os.path.exists(cwd):
 				exec_cmd("git clean -dxf", cwd=cwd)
 				exec_cmd("{pip} install --upgrade -e {app}".format(pip=pip, app=cwd))
+	if to_ver >= 5:
+		if not find_executable('npm') and not find_executable('node'):
+			raise Exception("Please install node and npm")
 
 def post_upgrade(from_ver, to_ver, bench='.'):
 	from .config import generate_nginx_config, generate_supervisor_config, generate_redis_cache_config, generate_redis_async_broker_config