diff --git a/Earthfile b/Earthfile
index b92b4df..8196966 100644
--- a/Earthfile
+++ b/Earthfile
@@ -19,8 +19,8 @@ ARG ALPINE_IMG=$SPECTRO_PUB_REPO/edge/canvos/alpine:$ALPINE_TAG
 FROM $ALPINE_IMG
 
 # Spectro Cloud and Kairos tags.
-ARG PE_VERSION=v4.4.12
-ARG SPECTRO_LUET_VERSION=v1.3.8-alpha2
+ARG PE_VERSION=v4.5.0-rc2
+ARG SPECTRO_LUET_VERSION=v1.3.8-alpha4
 ARG KAIROS_VERSION=v3.1.3
 ARG K3S_FLAVOR_TAG=k3s1
 ARG RKE2_FLAVOR_TAG=rke2r1