diff --git a/golang-http/simple/go.mod b/golang-http/simple/go.mod
index c9b759e9..36981527 100644
--- a/golang-http/simple/go.mod
+++ b/golang-http/simple/go.mod
@@ -6,7 +6,7 @@ go 1.25.0
 // NOTICE: these lines could be generated automatically by "go mod tidy"
 require (
 	github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5
-	github.com/envoyproxy/envoy v1.39.2
+	github.com/envoyproxy/envoy v1.39.3
 	google.golang.org/protobuf v1.36.12
 )
 
diff --git a/golang-http/simple/go.sum b/golang-http/simple/go.sum
index b33c5093..85753a22 100644
--- a/golang-http/simple/go.sum
+++ b/golang-http/simple/go.sum
@@ -2,8 +2,8 @@ cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
 cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
 github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5 h1:6xNmx7iTtyBRev0+D/Tv1FZd4SCg8axKApyNyRsAt/w=
 github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5/go.mod h1:KdCmV+x/BuvyMxRnYBlmVaq4OLiKW6iRQfvC62cvdkI=
-github.com/envoyproxy/envoy v1.39.2 h1:GP/GRcIRjexTs1ZCewyZF9c1DkEQfjKDVO+TxsuiCPg=
-github.com/envoyproxy/envoy v1.39.2/go.mod h1:H6oycjaa4SVHpFuyGdl9GmCe3mPmCBYO40FFTxkZ1rU=
+github.com/envoyproxy/envoy v1.39.3 h1:tzKu4UtxDH3Y86Z3rw0kzy0VnN1OVIdcALZgEJ7ZDPw=
+github.com/envoyproxy/envoy v1.39.3/go.mod h1:H6oycjaa4SVHpFuyGdl9GmCe3mPmCBYO40FFTxkZ1rU=
 github.com/envoyproxy/protoc-gen-validate v1.3.0 h1:TvGH1wof4H33rezVKWSpqKz5NXWg5VPuZ0uONDT6eb4=
 github.com/envoyproxy/protoc-gen-validate v1.3.0/go.mod h1:HvYl7zwPa5mffgyeTUHA9zHIH36nmrm7oCbo4YKoSWA=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=