diff --git a/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go b/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
index c57857ac0..57a792a7b 100644
--- a/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
+++ b/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
@@ -19,7 +19,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/lb/v1/load_balancer.proto
 
diff --git a/channelz/grpc_channelz_v1/channelz_grpc.pb.go b/channelz/grpc_channelz_v1/channelz_grpc.pb.go
index 5fa65ff9a..1cccdb0e8 100644
--- a/channelz/grpc_channelz_v1/channelz_grpc.pb.go
+++ b/channelz/grpc_channelz_v1/channelz_grpc.pb.go
@@ -21,7 +21,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/channelz/v1/channelz.proto
 
diff --git a/cmd/protoc-gen-go-grpc/main.go b/cmd/protoc-gen-go-grpc/main.go
index 65b946912..0cb6a0212 100644
--- a/cmd/protoc-gen-go-grpc/main.go
+++ b/cmd/protoc-gen-go-grpc/main.go
@@ -41,7 +41,7 @@ import (
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-const version = "1.3.0"
+const version = "1.4.0"
 
 var requireUnimplemented *bool
 var useGenericStreams *bool
diff --git a/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go b/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
index d1af55260..358074b64 100644
--- a/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
+++ b/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/gcp/handshaker.proto
 
diff --git a/examples/features/proto/echo/echo_grpc.pb.go b/examples/features/proto/echo/echo_grpc.pb.go
index c04d05784..84dc8d34c 100644
--- a/examples/features/proto/echo/echo_grpc.pb.go
+++ b/examples/features/proto/echo/echo_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: examples/features/proto/echo/echo.proto
 
diff --git a/examples/helloworld/helloworld/helloworld_grpc.pb.go b/examples/helloworld/helloworld/helloworld_grpc.pb.go
index 21b376dcd..16db1f862 100644
--- a/examples/helloworld/helloworld/helloworld_grpc.pb.go
+++ b/examples/helloworld/helloworld/helloworld_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: examples/helloworld/helloworld/helloworld.proto
 
diff --git a/examples/route_guide/routeguide/route_guide_grpc.pb.go b/examples/route_guide/routeguide/route_guide_grpc.pb.go
index 3dacdbdc5..05a38ab30 100644
--- a/examples/route_guide/routeguide/route_guide_grpc.pb.go
+++ b/examples/route_guide/routeguide/route_guide_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: examples/route_guide/routeguide/route_guide.proto
 
diff --git a/health/grpc_health_v1/health_grpc.pb.go b/health/grpc_health_v1/health_grpc.pb.go
index 1518e3254..51b736ba0 100644
--- a/health/grpc_health_v1/health_grpc.pb.go
+++ b/health/grpc_health_v1/health_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/health/v1/health.proto
 
diff --git a/internal/proto/grpc_lookup_v1/rls_grpc.pb.go b/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
index 3ce28f68e..5c7a25efd 100644
--- a/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
+++ b/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/lookup/v1/rls.proto
 
diff --git a/interop/grpc_testing/benchmark_service_grpc.pb.go b/interop/grpc_testing/benchmark_service_grpc.pb.go
index 02b9c8c40..3a54d00c1 100644
--- a/interop/grpc_testing/benchmark_service_grpc.pb.go
+++ b/interop/grpc_testing/benchmark_service_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/testing/benchmark_service.proto
 
diff --git a/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go b/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
index dabdf9ffa..cf4aff887 100644
--- a/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
+++ b/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/testing/report_qps_scenario_service.proto
 
diff --git a/interop/grpc_testing/test_grpc.pb.go b/interop/grpc_testing/test_grpc.pb.go
index 4ae334be8..fd79b2f02 100644
--- a/interop/grpc_testing/test_grpc.pb.go
+++ b/interop/grpc_testing/test_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/testing/test.proto
 
diff --git a/interop/grpc_testing/worker_service_grpc.pb.go b/interop/grpc_testing/worker_service_grpc.pb.go
index 4a5da02ed..32ff7d9e2 100644
--- a/interop/grpc_testing/worker_service_grpc.pb.go
+++ b/interop/grpc_testing/worker_service_grpc.pb.go
@@ -17,7 +17,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/testing/worker_service.proto
 
diff --git a/interop/stress/grpc_testing/metrics_grpc.pb.go b/interop/stress/grpc_testing/metrics_grpc.pb.go
index c3073fba8..1524d726b 100644
--- a/interop/stress/grpc_testing/metrics_grpc.pb.go
+++ b/interop/stress/grpc_testing/metrics_grpc.pb.go
@@ -21,7 +21,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: interop/stress/grpc_testing/metrics.proto
 
diff --git a/profiling/proto/service_grpc.pb.go b/profiling/proto/service_grpc.pb.go
index 5e96e5029..06b134ed5 100644
--- a/profiling/proto/service_grpc.pb.go
+++ b/profiling/proto/service_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: profiling/proto/service.proto
 
diff --git a/reflection/grpc_reflection_v1/reflection_grpc.pb.go b/reflection/grpc_reflection_v1/reflection_grpc.pb.go
index 6e544f81e..17d21fde2 100644
--- a/reflection/grpc_reflection_v1/reflection_grpc.pb.go
+++ b/reflection/grpc_reflection_v1/reflection_grpc.pb.go
@@ -21,7 +21,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: grpc/reflection/v1/reflection.proto
 
diff --git a/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go b/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
index 3de5dc354..93886e382 100644
--- a/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
+++ b/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
@@ -18,7 +18,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // grpc/reflection/v1alpha/reflection.proto is a deprecated file.
 
diff --git a/reflection/grpc_testing/test_grpc.pb.go b/reflection/grpc_testing/test_grpc.pb.go
index 9459c9970..85b04f2a3 100644
--- a/reflection/grpc_testing/test_grpc.pb.go
+++ b/reflection/grpc_testing/test_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.3.0
+// - protoc-gen-go-grpc v1.4.0
 // - protoc             v4.25.2
 // source: reflection/grpc_testing/test.proto