diff --git a/crossplane/function/proto/v1/run_function_pb2.py b/crossplane/function/proto/v1/run_function_pb2.py
index 2c091b4..8a3947d 100644
--- a/crossplane/function/proto/v1/run_function_pb2.py
+++ b/crossplane/function/proto/v1/run_function_pb2.py
@@ -2,7 +2,7 @@
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # NO CHECKED-IN PROTOBUF GENCODE
 # source: crossplane/function/proto/v1/run_function.proto
-# Protobuf Python Version: 5.27.2
+# Protobuf Python Version: 5.29.0
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -12,8 +12,8 @@
 _runtime_version.ValidateProtobufRuntimeVersion(
     _runtime_version.Domain.PUBLIC,
     5,
-    27,
-    2,
+    29,
+    0,
     '',
     'crossplane/function/proto/v1/run_function.proto'
 )
diff --git a/crossplane/function/proto/v1/run_function_pb2_grpc.py b/crossplane/function/proto/v1/run_function_pb2_grpc.py
index 87c39cb..bc3a415 100644
--- a/crossplane/function/proto/v1/run_function_pb2_grpc.py
+++ b/crossplane/function/proto/v1/run_function_pb2_grpc.py
@@ -5,7 +5,7 @@
 
 from crossplane.function.proto.v1 import run_function_pb2 as crossplane_dot_function_dot_proto_dot_v1_dot_run__function__pb2
 
-GRPC_GENERATED_VERSION = '1.67.0'
+GRPC_GENERATED_VERSION = '1.71.0'
 GRPC_VERSION = grpc.__version__
 _version_not_supported = False
 
diff --git a/crossplane/function/proto/v1beta1/run_function_pb2.py b/crossplane/function/proto/v1beta1/run_function_pb2.py
index 84b0ab3..dcd2eb0 100644
--- a/crossplane/function/proto/v1beta1/run_function_pb2.py
+++ b/crossplane/function/proto/v1beta1/run_function_pb2.py
@@ -2,7 +2,7 @@
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # NO CHECKED-IN PROTOBUF GENCODE
 # source: crossplane/function/proto/v1beta1/run_function.proto
-# Protobuf Python Version: 5.27.2
+# Protobuf Python Version: 5.29.0
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -12,8 +12,8 @@
 _runtime_version.ValidateProtobufRuntimeVersion(
     _runtime_version.Domain.PUBLIC,
     5,
-    27,
-    2,
+    29,
+    0,
     '',
     'crossplane/function/proto/v1beta1/run_function.proto'
 )
diff --git a/crossplane/function/proto/v1beta1/run_function_pb2_grpc.py b/crossplane/function/proto/v1beta1/run_function_pb2_grpc.py
index d8814f8..1bd4f5d 100644
--- a/crossplane/function/proto/v1beta1/run_function_pb2_grpc.py
+++ b/crossplane/function/proto/v1beta1/run_function_pb2_grpc.py
@@ -5,7 +5,7 @@
 
 from crossplane.function.proto.v1beta1 import run_function_pb2 as crossplane_dot_function_dot_proto_dot_v1beta1_dot_run__function__pb2
 
-GRPC_GENERATED_VERSION = '1.67.0'
+GRPC_GENERATED_VERSION = '1.71.0'
 GRPC_VERSION = grpc.__version__
 _version_not_supported = False
 
diff --git a/pyproject.toml b/pyproject.toml
index cbdbba7..da0ff9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers = [
 dependencies = [
   "grpcio==1.71.0",
   "grpcio-reflection==1.*",
-  "protobuf==6.30.2",
+  "protobuf==5.29.3", # Must be compatible with grpcio-tools.
   "pydantic==2.*",
   "structlog==25.*",
 ]
@@ -45,7 +45,10 @@ dependencies = ["ipython==9.0.2"]
 type = "virtual"
 detached = true
 path = ".venv-generate"
-dependencies = ["grpcio-tools==1.71.0"]
+dependencies = [
+  "grpcio-tools==1.71.0",
+  "protobuf==5.29.3",
+]
 
 [tool.hatch.envs.generate.scripts]
 protoc = "python -m grpc_tools.protoc --proto_path=. --python_out=. --pyi_out=. --grpc_python_out=. crossplane/function/proto/v1beta1/run_function.proto crossplane/function/proto/v1/run_function.proto"