diff --git a/golang-network/simple/go.mod b/golang-network/simple/go.mod
index 1b200ec..a21b9e2 100644
--- a/golang-network/simple/go.mod
+++ b/golang-network/simple/go.mod
@@ -6,7 +6,7 @@ go 1.18
 // NOTICE: these lines could be generated automatically by "go mod tidy"
 require (
 	github.com/cncf/xds/go v0.0.0-20231128003011-0fa0005c9caa
-	github.com/envoyproxy/envoy v1.31.0
+	github.com/envoyproxy/envoy v1.31.1
 	google.golang.org/protobuf v1.34.2
 )
 
diff --git a/golang-network/simple/go.sum b/golang-network/simple/go.sum
index 8af2fda..bde7699 100644
--- a/golang-network/simple/go.sum
+++ b/golang-network/simple/go.sum
@@ -1,7 +1,7 @@
 github.com/cncf/xds/go v0.0.0-20231128003011-0fa0005c9caa h1:jQCWAUqqlij9Pgj2i/PB79y4KOPYVyFYdROxgaCwdTQ=
 github.com/cncf/xds/go v0.0.0-20231128003011-0fa0005c9caa/go.mod h1:x/1Gn8zydmfq8dk6e9PdstVsDgu9RuyIIJqAaF//0IM=
-github.com/envoyproxy/envoy v1.31.0 h1:NsTo+medzu0bMffXAjl+zKaViLOShKuIZWQnKKYq0/4=
-github.com/envoyproxy/envoy v1.31.0/go.mod h1:ujBFxE543X8OePZG+FbeR9LnpBxTLu64IAU7A20EB9A=
+github.com/envoyproxy/envoy v1.31.1 h1:PKP2wmXoFwcBn6T0RkhBpyfTMjNvM3regGCWVwAZa7A=
+github.com/envoyproxy/envoy v1.31.1/go.mod h1:ujBFxE543X8OePZG+FbeR9LnpBxTLu64IAU7A20EB9A=
 github.com/envoyproxy/protoc-gen-validate v1.0.2 h1:QkIBuU5k+x7/QXPvPPnWXWlCdaBFApVqftFV6k087DA=
 github.com/envoyproxy/protoc-gen-validate v1.0.2/go.mod h1:GpiZQP3dDbg4JouG/NNS7QWXpgx6x8QiMKdmN72jogE=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=