diff --git a/tools/check.py b/tools/check.py
index 23df9ad5e4d6adcabe9132574b2967675479eb7d..22f1498a431aecf1efebeb041bbaeaaef80b4bbb 100755
--- a/tools/check.py
+++ b/tools/check.py
@@ -764,6 +764,8 @@ def command_line():
 def check_required_files(dir_to_validate):
     """Check if required files exists."""
     REQUIRED_FILES = ["01-*.md",
+                      "CONDUCT.md",
+                      "CONTRIBUTING.md",
                       "discussion.md",
                       "index.md",
                       "instructors.md",