diff --git a/.github/workflows/scdiff.yml b/.github/workflows/scdiff.yml
index 3dd02033..7ffc03e6 100644
--- a/.github/workflows/scdiff.yml
+++ b/.github/workflows/scdiff.yml
@@ -1,7 +1,7 @@
 name: scdiff PR evaluation
 on:
   issue_comment:
-    types: [created, edited]
+    types: [created]
 
 permissions: read-all
 
@@ -61,7 +61,7 @@ jobs:
         uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6.4.1
         with:
           script: |
-            const allowedAssociations = ["COLLABORATOR", "MEMBER", "OWNER"];
+            const allowedAssociations = ["COLLABORATOR", "CONTRIBUTOR", "MEMBER", "OWNER"];
             authorAssociation = '${{ github.event.comment.author_association }}'
             if (!allowedAssociations.includes(authorAssociation)) {
               core.setFailed("You don't have access to run scdiff");