diff --git a/go.mod b/go.mod
index 804b778c2e98..166a48bd5e5d 100644
--- a/go.mod
+++ b/go.mod
@@ -82,7 +82,7 @@ require (
 	golang.org/x/tools v0.36.0
 	golang.org/x/tools/cmd/cover v0.1.0-deprecated
 	google.golang.org/grpc v1.69.4
-	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.2.0
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1
 	google.golang.org/protobuf v1.36.6
 	honnef.co/go/tools v0.6.0
 )
diff --git a/go.sum b/go.sum
index 608a0bee9b65..bf6c8a92b001 100644
--- a/go.sum
+++ b/go.sum
@@ -1278,8 +1278,8 @@ google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAG
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/grpc v1.69.4 h1:MF5TftSMkd8GLw/m0KM6V8CMOCY6NZ1NQDPGFgbTt4A=
 google.golang.org/grpc v1.69.4/go.mod h1:vyjdE6jLBI76dgpDojsFGNaHlxdjXN9ghpnd2o7JGZ4=
-google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.2.0 h1:TLkBREm4nIsEcexnCjgQd5GQWaHcqMzwQV0TX9pq8S0=
-google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.2.0/go.mod h1:DNq5QpG7LJqD2AamLZ7zvKE0DEpVl2BSEVjFycAAjRY=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 h1:F29+wU6Ee6qgu9TddPgooOdaqsxTMunOoj8KA5yuS5A=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1/go.mod h1:5KF+wpkbTSbGcR9zteSqZV6fqFOWBl4Yde8En8MryZA=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -1292,7 +1292,6 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
 google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
diff --git a/internal/cloudplugin/cloudproto1/cloudproto1.pb.go b/internal/cloudplugin/cloudproto1/cloudproto1.pb.go
index b2f2f048e43e..e8749e86d2e0 100644
--- a/internal/cloudplugin/cloudproto1/cloudproto1.pb.go
+++ b/internal/cloudplugin/cloudproto1/cloudproto1.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: cloudproto1.proto
 
 package cloudproto1
diff --git a/internal/plans/planproto/planfile.pb.go b/internal/plans/planproto/planfile.pb.go
index e4351e496428..ada0316eea92 100644
--- a/internal/plans/planproto/planfile.pb.go
+++ b/internal/plans/planproto/planfile.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: planfile.proto
 
 package planproto
diff --git a/internal/rpcapi/terraform1/dependencies/dependencies.pb.go b/internal/rpcapi/terraform1/dependencies/dependencies.pb.go
index 8a7ee854d47f..5188373816dd 100644
--- a/internal/rpcapi/terraform1/dependencies/dependencies.pb.go
+++ b/internal/rpcapi/terraform1/dependencies/dependencies.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: dependencies.proto
 
 package dependencies
diff --git a/internal/rpcapi/terraform1/packages/packages.pb.go b/internal/rpcapi/terraform1/packages/packages.pb.go
index 717afb662e4b..9943321d5fb5 100644
--- a/internal/rpcapi/terraform1/packages/packages.pb.go
+++ b/internal/rpcapi/terraform1/packages/packages.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: packages.proto
 
 package packages
diff --git a/internal/rpcapi/terraform1/setup/setup.pb.go b/internal/rpcapi/terraform1/setup/setup.pb.go
index 03a2d115f36f..6af8ecf1ce2b 100644
--- a/internal/rpcapi/terraform1/setup/setup.pb.go
+++ b/internal/rpcapi/terraform1/setup/setup.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: setup.proto
 
 package setup
diff --git a/internal/rpcapi/terraform1/stacks/stacks.pb.go b/internal/rpcapi/terraform1/stacks/stacks.pb.go
index 3293d9def244..f226a8cd790a 100644
--- a/internal/rpcapi/terraform1/stacks/stacks.pb.go
+++ b/internal/rpcapi/terraform1/stacks/stacks.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: stacks.proto
 
 package stacks
diff --git a/internal/rpcapi/terraform1/terraform1.pb.go b/internal/rpcapi/terraform1/terraform1.pb.go
index 71aa4ef1f658..1cac135a2aef 100644
--- a/internal/rpcapi/terraform1/terraform1.pb.go
+++ b/internal/rpcapi/terraform1/terraform1.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: terraform1.proto
 
 package terraform1
diff --git a/internal/stacks/tfstackdata1/tfstackdata1.pb.go b/internal/stacks/tfstackdata1/tfstackdata1.pb.go
index cb1fc74dd3a8..fefea2ac00e0 100644
--- a/internal/stacks/tfstackdata1/tfstackdata1.pb.go
+++ b/internal/stacks/tfstackdata1/tfstackdata1.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: tfstackdata1.proto
 
 package tfstackdata1
diff --git a/internal/stacksplugin/stacksproto1/stacksproto1.pb.go b/internal/stacksplugin/stacksproto1/stacksproto1.pb.go
index 88f2717fa3f0..42acc62ced6c 100644
--- a/internal/stacksplugin/stacksproto1/stacksproto1.pb.go
+++ b/internal/stacksplugin/stacksproto1/stacksproto1.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: stacksproto1.proto
 
 package stacksproto1
diff --git a/internal/tfplugin5/tfplugin5.pb.go b/internal/tfplugin5/tfplugin5.pb.go
index 151e1376a840..0efe38ddb4bf 100644
--- a/internal/tfplugin5/tfplugin5.pb.go
+++ b/internal/tfplugin5/tfplugin5.pb.go
@@ -22,7 +22,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: tfplugin5.proto
 
 package tfplugin5
diff --git a/internal/tfplugin6/tfplugin6.pb.go b/internal/tfplugin6/tfplugin6.pb.go
index c40bb14b33be..3b6146399e1e 100644
--- a/internal/tfplugin6/tfplugin6.pb.go
+++ b/internal/tfplugin6/tfplugin6.pb.go
@@ -22,7 +22,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v3.15.6
+// 	protoc        v5.29.3
 // source: tfplugin6.proto
 
 package tfplugin6
diff --git a/tools/protobuf-compile/protobuf-compile.go b/tools/protobuf-compile/protobuf-compile.go
index f9bff7acac13..de6a8c995560 100644
--- a/tools/protobuf-compile/protobuf-compile.go
+++ b/tools/protobuf-compile/protobuf-compile.go
@@ -27,7 +27,8 @@ import (
 	"github.com/hashicorp/go-getter"
 )
 
-const protocVersion = "3.15.6"
+// Release v29.3 in GitHub corresponds to protoc v5.29.3, which is currently used in terraform-plugin-go
+const protocVersion = "29.3"
 
 // We also use protoc-gen-go and its grpc addon, but since these are Go tools
 // in Go modules our version selection for these comes from our top-level