diff --git a/synthtool/gcp/templates/node_library/.eslintrc.yml b/synthtool/gcp/templates/node_library/.eslintrc.yml
index 65f1dce6c..73eeec276 100644
--- a/synthtool/gcp/templates/node_library/.eslintrc.yml
+++ b/synthtool/gcp/templates/node_library/.eslintrc.yml
@@ -12,3 +12,4 @@ rules:
   eqeqeq: error
   no-warning-comments: warn
   no-var: error
+  prefer-const: error