diff --git a/x/go.mod b/x/go.mod
index 9fe3dcc71..9d63ac2a0 100644
--- a/x/go.mod
+++ b/x/go.mod
@@ -43,7 +43,7 @@ require (
 	github.com/bits-and-blooms/bloom/v3 v3.6.0 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cheekybits/genny v0.0.0-20170328200008-9127e812e1e9 // indirect
-	github.com/cloudflare/circl v1.5.0 // indirect
+	github.com/cloudflare/circl v1.6.3 // indirect
 	github.com/cognusion/go-cache-lru v0.0.0-20170419142635-f73e2280ecea // indirect
 	github.com/coreos/go-iptables v0.7.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
diff --git a/x/go.sum b/x/go.sum
index ff4d66e87..fd2607722 100644
--- a/x/go.sum
+++ b/x/go.sum
@@ -53,8 +53,8 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/cilium/ebpf v0.11.0 h1:V8gS/bTCCjX9uUnkUFUpPsksM8n1lXBAvHcpiFk1X2Y=
 github.com/cilium/ebpf v0.11.0/go.mod h1:WE7CZAnqOL2RouJ4f1uyNhqr2P4CCvXFIqdRDUgWsVs=
-github.com/cloudflare/circl v1.5.0 h1:hxIWksrX6XN5a1L2TI/h53AGPhNHoUBo+TD1ms9+pys=
-github.com/cloudflare/circl v1.5.0/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
+github.com/cloudflare/circl v1.6.3 h1:9GPOhQGF9MCYUeXyMYlqTR6a5gTrgR/fBLXvUgtVcg8=
+github.com/cloudflare/circl v1.6.3/go.mod h1:2eXP6Qfat4O/Yhh8BznvKnJ+uzEoTQ6jVKJRn81BiS4=
 github.com/cognusion/go-cache-lru v0.0.0-20170419142635-f73e2280ecea h1:9C2rdYRp8Vzwhm3sbFX0yYfB+70zKFRjn7cnPCucHSw=
 github.com/cognusion/go-cache-lru v0.0.0-20170419142635-f73e2280ecea/go.mod h1:MdyNkAe06D7xmJsf+MsLvbZKYNXuOHLKJrvw+x4LlcQ=
 github.com/coreos/go-iptables v0.7.0 h1:XWM3V+MPRr5/q51NuWSgU0fqMad64Zyxs8ZUoMsamr8=