diff --git a/VERSION b/VERSION
index a4a179fe22894550a20a3e7efb979abd2dc1ccfa..686a6b3e54280c9539884b3f40179e2d6deda94b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.3-rc1
+1.6.3-rc2
diff --git a/arkindex/system_workers.yml b/arkindex/system_workers.yml
index 89d9fd890b58bf3991bbdbcb707fd507d3dc065d..da2ea44766c9aeea1feae9bf6e1159a9ad39fe7d 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: 1.6.3-rc1
+version: 1.6.3-rc2
 
 features:
     init_elements: registry.gitlab.teklia.com/arkindex/workers/init-elements:0.1.0