diff --git a/install-ngxblocker b/install-ngxblocker
index 55c12d5d5..618c182cc 100755
--- a/install-ngxblocker
+++ b/install-ngxblocker
@@ -208,6 +208,14 @@ wget_opts() {
 	echo $opts
 }
 
+check_depends() {
+	# centos does not have wget installed by default
+	if ! wget --help >/dev/null 2>&1; then
+		printf "$0 requires: wget \n"
+		exit 1
+	fi
+}
+
 check_online() {
 	local url=$1 options=$(wget_opts)
 
@@ -225,6 +233,8 @@ main() {
 		exit 1
 	fi
 
+	check_depends
+
 	# parse command line
 	get_options $@
 	include_url=$REPO/include_filelist.txt
@@ -270,4 +280,3 @@ exit $?
 # PLEASE ALSO SEE THE SETUP SCRIPT TO INSERT THE NECESSARY INCLUDES FOR YOU
 ### You can now use a setup script contributed by Stuart Cardall to automatically add the includes for you
 ### See - https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/setup-ngxblocker
-