diff --git a/non_module_dev_deps.bzl b/non_module_dev_deps.bzl
index 4295419a9..bca3a5a54 100644
--- a/non_module_dev_deps.bzl
+++ b/non_module_dev_deps.bzl
@@ -66,12 +66,12 @@ def repositories(*, bzlmod):
     # no modules are provided at the moment for buildifier
     http_archive(
         name = "com_github_bazelbuild_buildtools",
-        sha256 = "977a0bd4593c8d4c8f45e056d181c35e48aa01ad4f8090bdb84f78dca42f47dc",
+        sha256 = "42968f9134ba2c75c03bb271bd7bb062afb7da449f9b913c96e5be4ce890030a",
         # fix runner.bash.template always returning success, format MODULE.bazel and WORKSPACE.bzlmod too
         patches = ["@rules_haskell//buildifier:buildifier_test-workspace.patch"],
         patch_args = ["-p1"],
-        strip_prefix = "buildtools-6.1.2",
-        urls = ["https://github.com/bazelbuild/buildtools/archive/v6.1.2.tar.gz"],
+        strip_prefix = "buildtools-6.3.3",
+        urls = ["https://github.com/bazelbuild/buildtools/archive/v6.3.3.tar.gz"],
     )
 
     nixpkgs_local_repository(
diff --git a/rules_haskell_tests/non_module_deps.bzl b/rules_haskell_tests/non_module_deps.bzl
index 83d19b8d0..e8be0c521 100644
--- a/rules_haskell_tests/non_module_deps.bzl
+++ b/rules_haskell_tests/non_module_deps.bzl
@@ -65,12 +65,12 @@ def repositories(*, bzlmod):
     # no modules are provided at the moment for buildifier
     http_archive(
         name = "com_github_bazelbuild_buildtools",
-        sha256 = "977a0bd4593c8d4c8f45e056d181c35e48aa01ad4f8090bdb84f78dca42f47dc",
+        sha256 = "42968f9134ba2c75c03bb271bd7bb062afb7da449f9b913c96e5be4ce890030a",
         # fix runner.bash.template always returning success, format MODULE.bazel and WORKSPACE.bzlmod too
         patches = ["@rules_haskell//buildifier:buildifier_test-workspace.patch"],
         patch_args = ["-p1"],
-        strip_prefix = "buildtools-6.1.2",
-        urls = ["https://github.com/bazelbuild/buildtools/archive/v6.1.2.tar.gz"],
+        strip_prefix = "buildtools-6.3.3",
+        urls = ["https://github.com/bazelbuild/buildtools/archive/v6.3.3.tar.gz"],
     )
 
     http_archive(