diff --git a/Dockerfile b/Dockerfile
index 01136c856e..6ff1bff56d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # When rebasing to new Fedora, also update openshift/release:
 # https://github.com/openshift/release/tree/master/ci-operator/config/coreos/coreos-assembler/coreos-coreos-assembler-main.yaml
-FROM registry.fedoraproject.org/fedora:37
+FROM registry.fedoraproject.org/fedora:38
 WORKDIR /root/containerbuild
 
 # Keep this Dockerfile idempotent for local development rebuild use cases.
diff --git a/build.sh b/build.sh
index 13a404df02..8dd1066f32 100755
--- a/build.sh
+++ b/build.sh
@@ -45,9 +45,9 @@ install_rpms() {
 
     # freeze grub2 for https://github.com/coreos/coreos-assembler/issues/3370
     case "${arch}" in
-        x86_64) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,efi-x64,pc,pc-modules}-1:2.06-75.fc37);;
-        aarch64) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,efi-aa64}-1:2.06-75.fc37);;
-        ppc64le) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,ppc64le,ppc64le-modules}-1:2.06-75.fc37);;
+        x86_64) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,efi-x64,pc,pc-modules}-1:2.06-76.fc38);;
+        aarch64) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,efi-aa64}-1:2.06-76.fc38);;
+        ppc64le) frozendeps=$(echo grub2-{common,tools,tools-extra,tools-minimal,ppc64le,ppc64le-modules}-1:2.06-76.fc38);;
         *) ;;
     esac