diff --git a/haproxy/haproxy.cfg b/haproxy/haproxy.cfg
index 1833d22..d81ab22 100644
--- a/haproxy/haproxy.cfg
+++ b/haproxy/haproxy.cfg
@@ -176,7 +176,7 @@ backend haproxy-to-varnish-cache
 
 backend servers
 	balance roundrobin
-	default-server ssl verify required ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4 inter 30s
+	default-server ssl verify required ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4 inter 120s
 	use-server %[lua.get_server_names] if TRUE
 
 backend bot_check_post_throttle
diff --git a/src/lua/scripts/register-servers.lua b/src/lua/scripts/register-servers.lua
index b0f0a33..df48479 100644
--- a/src/lua/scripts/register-servers.lua
+++ b/src/lua/scripts/register-servers.lua
@@ -43,11 +43,11 @@ function setup_servers()
 		if verify_backend_ssl ~= nil then
 			if verify_none ~= nil then -- for development use only
 				tcp:send(string.format(
-					"add server %s %s ssl verify none ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4;",
+					"add server %s %s ssl verify none ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4 inter 120s;",
 					server_name, backend_host))
 			else
 				tcp:send(string.format(
-					"add server %s %s ssl verify required ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4;",
+					"add server %s %s ssl verify required ca-file ca-certificates.crt sni req.hdr(Host) check observe layer4 inter 120s;",
 					server_name, backend_host))
 			end
 		else