diff --git a/blockcheck.sh b/blockcheck.sh
index 7de9227..e5bc791 100755
--- a/blockcheck.sh
+++ b/blockcheck.sh
@@ -262,7 +262,7 @@ curl_supports_tls13()
 	[ $? = 2 ] && return 1
 	# curl can have tlsv1.3 key present but ssl library without TLS 1.3 support
 	# this is online test because there's no other way to trigger library incompatibility case
-	curl --tlsv1.3 -Is -o /dev/null https://w3.org 2>/dev/null
+	curl --tlsv1.3 --max-time $CURL_MAX_TIME -Is -o /dev/null https://w3.org 2>/dev/null
 	[ $? != 4 ]
 }
 curl_supports_tlsmax()