diff --git a/actions/build_fuzzers/action.yml b/actions/build_fuzzers/action.yml
index 83cd17c..3c5af0a 100644
--- a/actions/build_fuzzers/action.yml
+++ b/actions/build_fuzzers/action.yml
@@ -34,10 +34,12 @@ inputs:
     description: |
       The branch of the git repo to use for storing certain artifacts from
       fuzzing.
+    default: main
     required: false
   storage-repo-branch-coverage:
     description: |
       The branch of the git repo to use for storing coverage reports.
+    default: gh-pages
     required: false
   upload-build:
     description: |