diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index bb4c0c2f..f1b50f48 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -35,6 +35,10 @@ jobs:
       - name: Setup Bazelisk
         run: go install github.com/bazelbuild/bazelisk@latest && export PATH=$PATH:$(go env GOPATH)/bin
       - uses: actions/checkout@v4
+      - name: Build license target
+        env:
+          USE_BAZEL_VERSION: ${{ matrix.bazel }}
+        run: ~/go/bin/bazelisk build //:license --enable_bzlmod=true --enable_workspace=false
       - name: Run bazel-diff tests
         env:
           USE_BAZEL_VERSION: ${{ matrix.bazel }}
diff --git a/BUILD b/BUILD
index 41671011..9ee007cb 100644
--- a/BUILD
+++ b/BUILD
@@ -1,4 +1,5 @@
 load("@rules_kotlin//kotlin:core.bzl", "define_kt_toolchain")
+load("@rules_license//rules:license.bzl", "license")
 
 alias(
     name = "bazel-diff",
@@ -10,6 +11,21 @@ alias(
     actual = "//cli/format:format",
 )
 
+package(
+    default_applicable_licenses = [":license"],
+    default_visibility = ["//visibility:public"],
+)
+
+license(
+    name = "license",
+    package_name = "bazel-diff",
+    copyright_notice = "Copyright (c) 2020, Match Group, LLC",
+    license_kind = "@rules_license//licenses/spdx:BSD-3-Clause",
+    license_text = "LICENSE",
+    package_url = "https://github.com/Tinder/bazel-diff",
+    package_version = "29.0.0",
+)
+
 define_kt_toolchain(
     name = "kotlin_toolchain",
     jvm_target = "11",
diff --git a/MODULE.bazel b/MODULE.bazel
index f66882bc..dc0f339b 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -13,6 +13,7 @@ bazel_dep(name = "bazel_skylib", version = "1.9.0")
 bazel_dep(name = "rules_proto", version = "7.1.0")
 bazel_dep(name = "rules_java", version = "9.3.0")
 bazel_dep(name = "rules_kotlin", version = "2.3.0")
+bazel_dep(name = "rules_license", version = "1.0.0")
 bazel_dep(name = "rules_jvm_external", version = "6.10")
 
 # Add protobuf and grpc for Bazel 9 compatibility
diff --git a/tools/generate_readme.py b/tools/generate_readme.py
index 2a7077c4..091bd08a 100644
--- a/tools/generate_readme.py
+++ b/tools/generate_readme.py
@@ -250,6 +250,21 @@ def read_module_version(workspace_dir: Path) -> str:
     return match.group(1)
 
 
+def sync_build_version(workspace_dir: Path, version: str) -> None:
+    """Keep the license() package_version in the root BUILD file in sync."""
+    build_file = workspace_dir / "BUILD"
+    text = build_file.read_text()
+    new_text, count = re.subn(
+        r'(package_version\s*=\s*")[^"]+(")',
+        rf"\g<1>{version}\g<2>",
+        text,
+    )
+    if count == 0:
+        raise ValueError("Could not find package_version in BUILD")
+    if new_text != text:
+        build_file.write_text(new_text)
+
+
 def main() -> None:
     workspace_dir = Path(os.environ["BUILD_WORKSPACE_DIRECTORY"])
     output_path = workspace_dir / "README.md"
@@ -262,6 +277,7 @@ def main() -> None:
 
     version = read_module_version(workspace_dir)
     template = template.replace("{{BAZEL_DIFF_VERSION}}", version)
+    sync_build_version(workspace_dir, version)
 
     print("Fetching GitHub user data...")
     email_map = fetch_github_email_map(REPO)