diff --git a/data/hostname/worker01.softwareheritage.org.yaml b/data/hostname/worker01.softwareheritage.org.yaml
index 47205906..5759f90b 100644
--- a/data/hostname/worker01.softwareheritage.org.yaml
+++ b/data/hostname/worker01.softwareheritage.org.yaml
@@ -1,19 +1,21 @@
 networks:
   private:
     interface: eth1
     address: 192.168.100.21
     netmask: 255.255.255.0
     gateway: 192.168.100.1
   default:
     interface: eth0
     address: 128.93.193.21
     netmask: 255.255.255.0
     gateway: 128.93.193.254
 
 # temporary for testing swh-loader-dir before going live
 swh::deploy::storage::db::dbname: softwareheritage-test-svn
 
 swh::deploy::worker::instances:
   - swh_loader_git
   - swh_lister_github
   - swh_reader_git
+
+swh::deploy::worker::swh_storage_archiver_azure::concurrency: 1