diff --git a/.pre-commit-hooks.yaml b/.pre-commit-hooks.yaml
index 44a8648d..860c8a66 100644
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@@ -124,6 +124,12 @@
     entry: detect-private-key
     language: python
     types: [text]
+-   id: detect-do-not-commit
+    name: Detect do-not-commit
+    description: Detects the presence of do-not-commit
+    entry: detect-do-not-commit
+    language: python
+    types: [file]
 -   id: double-quote-string-fixer
     name: fix double quoted strings
     description: replaces double quoted strings with single quoted strings.
diff --git a/pre_commit_hooks/detect_do_not_commit.py b/pre_commit_hooks/detect_do_not_commit.py
new file mode 100644
index 00000000..1d7d6a60
--- /dev/null
+++ b/pre_commit_hooks/detect_do_not_commit.py
@@ -0,0 +1,32 @@
+import argparse
+from typing import Optional
+from typing import Sequence
+
+BLACKLIST = [
+    b'\x64\x6e\x63', #dnc
+]
+
+
+def main(argv: Optional[Sequence[str]] = None) -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('filenames', nargs='*', help='Filenames to check')
+    args = parser.parse_args(argv)
+
+    bad_files = []
+
+    for filename in args.filenames:
+        with open(filename, 'rb') as f:
+            content = f.read()
+            if any(line in content for line in BLACKLIST):
+                bad_files.append(filename)
+
+    if bad_files:
+        for bad_file in bad_files:
+            print(f'do not commit tag found: {bad_file}')
+        return 1
+    else:
+        return 0
+
+
+if __name__ == '__main__':
+    exit(main())
diff --git a/setup.cfg b/setup.cfg
index 82a5457c..fa292484 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -49,6 +49,7 @@ console_scripts =
     destroyed-symlinks = pre_commit_hooks.destroyed_symlinks:main
     detect-aws-credentials = pre_commit_hooks.detect_aws_credentials:main
     detect-private-key = pre_commit_hooks.detect_private_key:main
+    detect-do-not-commit = pre_commit_hooks.detect_do_not_commit:main
     double-quote-string-fixer = pre_commit_hooks.string_fixer:main
     end-of-file-fixer = pre_commit_hooks.end_of_file_fixer:main
     file-contents-sorter = pre_commit_hooks.file_contents_sorter:main