diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index b6211f4145..097973d83f 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -288,7 +288,13 @@ module Homebrew
   }
   def retrieve_pull_requests(formula_or_cask, name, state:, version: nil)
     tap_remote_repo = formula_or_cask.tap&.remote_repo || formula_or_cask.tap&.full_name
-    pull_requests = GitHub.fetch_pull_requests(name, tap_remote_repo, state: state, version: version)
+    pull_requests = begin
+      GitHub.fetch_pull_requests(name, tap_remote_repo, state: state, version: version)
+    rescue GitHub::API::ValidationFailedError => e
+      odebug "Error fetching pull requests for #{formula_or_cask} #{name}: #{e}"
+      nil
+    end
+
     if pull_requests&.any?
       pull_requests = pull_requests.map { |pr| "#{pr["title"]} (#{Formatter.url(pr["html_url"])})" }.join(", ")
     end