diff --git a/CodeQL.yml b/CodeQL.yml
new file mode 100644
index 000000000..c0292a99f
--- /dev/null
+++ b/CodeQL.yml
@@ -0,0 +1,3 @@
+path_classifiers:
+  library:
+    - "src/externalPackages/src/azure-activedirectory-identitymodel-extensions-for-dotnet/**"