diff --git a/changelog/unreleased/max-concurrency.md b/changelog/unreleased/max-concurrency.md
index 43aa300fa..b46af8ab6 100644
--- a/changelog/unreleased/max-concurrency.md
+++ b/changelog/unreleased/max-concurrency.md
@@ -1,5 +1,6 @@
 Bugfix: Set MaxConcurrency to 1
 
-Set MaxConcurrency for frontend and userlog services to 1. Too many workers will negatively impact performance on small machines.
+Set MaxConcurrency for frontend and userlog and sharing services to 1. Too many workers will negatively impact performance on small machines.
 
+https://github.com/owncloud/ocis/pull/10580
 https://github.com/owncloud/ocis/pull/10557
diff --git a/services/sharing/pkg/config/defaults/defaultconfig.go b/services/sharing/pkg/config/defaults/defaultconfig.go
index 7a88eea71..b4f02fcb6 100644
--- a/services/sharing/pkg/config/defaults/defaultconfig.go
+++ b/services/sharing/pkg/config/defaults/defaultconfig.go
@@ -47,7 +47,7 @@ func DefaultConfig() *config.Config {
 			JSONCS3: config.UserSharingJSONCS3Driver{
 				ProviderAddr:   "com.owncloud.api.storage-system",
 				SystemUserIDP:  "internal",
-				MaxConcurrency: 5,
+				MaxConcurrency: 1,
 			},
 			OwnCloudSQL: config.UserSharingOwnCloudSQLDriver{
 				DBUsername: "owncloud",