diff --git a/packages/@aws-cdk/aws-synthetics-alpha/.npmignore b/packages/@aws-cdk/aws-synthetics-alpha/.npmignore
index 35021099d0a89..0d049da0e16bc 100644
--- a/packages/@aws-cdk/aws-synthetics-alpha/.npmignore
+++ b/packages/@aws-cdk/aws-synthetics-alpha/.npmignore
@@ -21,9 +21,13 @@ tsconfig.json
 
 .eslintrc.js
 jest.config.js
+
 # exclude cdk artifacts
 **/cdk.out
 junit.xml
 test/
 !*.lit.ts
 **/*.snapshot
+
+# include custom-resource-handlers
+!custom-resource-handlers/*