diff --git a/VERSION b/VERSION
index f8a696c8dc56436062b4d179d96c78cbbbb718d7..f969869d3d9cb4faa2b81b2f2c7a2cb01c4500a1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.7.2
+1.7.3-beta1
diff --git a/arkindex/system_workers.yml b/arkindex/system_workers.yml
index 03efc879b2a34400fa2164c4c93b761867682b87..2ca1e9301b044212ba0281641a110644b32e915d 100644
--- a/arkindex/system_workers.yml
+++ b/arkindex/system_workers.yml
@@ -1,7 +1,7 @@
 # When releasing Arkindex, check that the Docker images set here are up to date,
 # then update the `version` to the current Arkindex version as set in the `VERSION` file
 # to confirm that the images have been manually checked.
-version: 1.7.2
+version: 1.7.3-beta1
 
 features:
     file_import:
@@ -10,7 +10,7 @@ features:
         image: registry.gitlab.teklia.com/arkindex/workers/init-elements:0.1.1
         command: worker-init-elements
     s3_ingest:
-        image: registry.gitlab.teklia.com/arkindex/workers/import/s3:0.2.0rc3
+        image: registry.gitlab.teklia.com/arkindex/workers/import/s3:0.2.0-rc4
     pdf_export:
         teklia_worker:
             name: arkindex/workers/export