diff --git a/cookbooks/digdag/shared_dir.rb b/cookbooks/digdag/shared_dir.rb
index d781b90..4d99cf1 100644
--- a/cookbooks/digdag/shared_dir.rb
+++ b/cookbooks/digdag/shared_dir.rb
@@ -55,6 +55,6 @@ file '/etc/fstab' do
   not_if 'grep apt-mirror /etc/fstab'
 end
 
-execute 'mount -a' do
+execute 'mount -a || true' do
   not_if 'df -h | grep shared'
 end