diff --git a/installers/omnibus/.env b/installers/omnibus/.env
index 908964c98..546ba87cf 100644
--- a/installers/omnibus/.env
+++ b/installers/omnibus/.env
@@ -7,11 +7,11 @@
 # of any line of this block as they might affect the release process.
 # See https://github.com/finos/legend/tree/master/releases/README.md
 
-LEGEND_OMNIBUS_IMAGE_VERSION=2024-04-01
-LEGEND_OMNIBUS_ENGINE_VERSION=4.42.3
-LEGEND_OMNIBUS_SDLC_VERSION=0.159.0
-LEGEND_OMNIBUS_PURE_IDE_VERSION=4.42.3
-LEGEND_OMNIBUS_STUDIO_VERSION=11.0.0
+LEGEND_OMNIBUS_IMAGE_VERSION=2023-12-05
+LEGEND_OMNIBUS_ENGINE_VERSION=4.36.0
+LEGEND_OMNIBUS_SDLC_VERSION=0.151.0
+LEGEND_OMNIBUS_PURE_IDE_VERSION=4.36.0
+LEGEND_OMNIBUS_STUDIO_VERSION=10.54.0
 
 # TODO: to be removed when we make SDLC backend configurable
 # See https://github.com/finos/legend-sdlc/issues/722
diff --git a/releases/2024-04-01/manifest.json b/releases/2024-04-01/manifest.json
deleted file mode 100644
index 1a33aa8be..000000000
--- a/releases/2024-04-01/manifest.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "version": "2024-04-01",
-  "timestamp": 1711949203000,
-  "releaseNotesUrl": "",
-  "core": {
-    "finos/legend-engine-server": "4.42.3",
-    "finos/legend-sdlc-server": "0.159.0",
-    "finos/legend-studio": "11.0.0"
-  }
-}