diff --git a/CHANGELOG-3.4.md b/CHANGELOG-3.4.md
index aa9fe74d3c7..f8b7135b8a7 100644
--- a/CHANGELOG-3.4.md
+++ b/CHANGELOG-3.4.md
@@ -110,7 +110,7 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [
 - Upgrade [`github.com/spf13/cobra`](https://github.com/spf13/cobra/releases) from [**`spf13/cobra@1c44ec8d3`**](https://github.com/spf13/cobra/commit/1c44ec8d3f1552cac48999f9306da23c4d8a288b) to [**`spf13/cobra@cd30c2a7e`**](https://github.com/spf13/cobra/commit/cd30c2a7e91a1d63fd9a0027accf18a681e9d50b).
 - Upgrade [`github.com/spf13/pflag`](https://github.com/spf13/pflag/releases) from [**`v1.0.0`**](https://github.com/spf13/pflag/releases/tag/v1.0.0) to [**`spf13/pflag@1ce0cc6db`**](https://github.com/spf13/pflag/commit/1ce0cc6db4029d97571db82f85092fccedb572ce).
 - Upgrade [`github.com/coreos/go-systemd`](https://github.com/coreos/go-systemd/releases) from [**`v15`**](https://github.com/coreos/go-systemd/releases/tag/v15) to [**`v17`**](https://github.com/coreos/go-systemd/releases/tag/v17).
-- Upgrade [`github.com/grpc-ecosystem/grpc-gateway`](https://github.com/grpc-ecosystem/grpc-gateway/releases) from [**`v1.3.1`**](https://github.com/grpc-ecosystem/grpc-gateway/releases/tag/v1.3.1) to [**`v1.4.0`**](https://github.com/grpc-ecosystem/grpc-gateway/releases/tag/v1.4.0).
+- Upgrade [`github.com/grpc-ecosystem/grpc-gateway`](https://github.com/grpc-ecosystem/grpc-gateway/releases) from [**`v1.3.1`**](https://github.com/grpc-ecosystem/grpc-gateway/releases/tag/v1.3.1) to [**`v1.4.1`**](https://github.com/grpc-ecosystem/grpc-gateway/releases/tag/v1.4.1).
 
 ### Metrics, Monitoring
 
diff --git a/Gopkg.lock b/Gopkg.lock
index bb74a2414d6..50309aa9f26 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -111,8 +111,8 @@
     "runtime/internal",
     "utilities"
   ]
-  revision = "74ba57806b9706edc6e2c9e5854ced57a9cd5ba0"
-  version = "v1.4.0"
+  revision = "92583770e3f01b09a0d3e9bdf64321d8bebd48f2"
+  version = "v1.4.1"
 
 [[projects]]
   name = "github.com/inconshreveable/mousetrap"
diff --git a/scripts/genproto.sh b/scripts/genproto.sh
index c440b4392dd..ba120f8e794 100755
--- a/scripts/genproto.sh
+++ b/scripts/genproto.sh
@@ -20,7 +20,7 @@ DIRS="./wal/walpb ./etcdserver/etcdserverpb ./etcdserver/api/snap/snappb ./raft/
 
 # exact version of packages to build
 GOGO_PROTO_SHA="1adfc126b41513cc696b209667c8656ea7aac67c"
-GRPC_GATEWAY_SHA="74ba57806b9706edc6e2c9e5854ced57a9cd5ba0"
+GRPC_GATEWAY_SHA="92583770e3f01b09a0d3e9bdf64321d8bebd48f2"
 SCHWAG_SHA="b7d0fc9aadaaae3d61aaadfc12e4a2f945514912"
 
 # set up self-contained GOPATH for building
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
index d82dc7f8d90..0e2bdf4457d 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
@@ -1,10 +1,10 @@
 package runtime
 
 import (
+	"context"
 	"io"
 	"net/http"
 
-	"context"
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/any"
@@ -38,7 +38,7 @@ func HTTPStatusFromCode(code codes.Code) int {
 	case codes.ResourceExhausted:
 		return http.StatusTooManyRequests
 	case codes.FailedPrecondition:
-		return http.StatusBadRequest
+		return http.StatusPreconditionFailed
 	case codes.Aborted:
 		return http.StatusConflict
 	case codes.OutOfRange: