diff --git a/.bazelrc b/.bazelrc
index 9322cbb0..35dd806e 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -26,3 +26,6 @@ build --@protobuf//bazel/toolchains:prefer_prebuilt_protoc
 # Ruff linting via aspect_rules_lint
 build --aspects=//tools/lint:linters.bzl%ruff
 build --@aspect_rules_lint//lint:fail_on_violation
+
+# Use free-threaded Python 3.14t
+build --platforms=//tools/platforms:freethreaded
diff --git a/MODULE.bazel b/MODULE.bazel
index 7863fa0f..b64c236d 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -5,9 +5,12 @@ module(
 
 register_toolchains("//tools/proto:python_toolchain_toolchain")
 
+register_execution_platforms("//tools/platforms:freethreaded")
+
 # --- Core dependencies ---
 
 bazel_dep(name = "bazel_skylib", version = "1.9.0")
+bazel_dep(name = "platforms", version = "1.0.0")
 bazel_dep(name = "rules_python", version = "1.9.0")
 bazel_dep(name = "rules_go", version = "0.60.0")
 bazel_dep(name = "gazelle", version = "0.47.0")
diff --git a/tools/platforms/BUILD.bazel b/tools/platforms/BUILD.bazel
new file mode 100644
index 00000000..c34ead2c
--- /dev/null
+++ b/tools/platforms/BUILD.bazel
@@ -0,0 +1,11 @@
+platform(
+    name = "freethreaded",
+    constraint_values = [
+        "@aspect_rules_py//uv/private/constraints/abi:freethreading_enabled",
+    ],
+    flags = [
+        "--@rules_python//python/config_settings:py_freethreaded=yes",
+    ],
+    parents = ["@platforms//host"],
+    visibility = ["//visibility:public"],
+)