diff --git a/Containerfile.common b/Containerfile.common
index 0a32d50e..3af0ad0a 100644
--- a/Containerfile.common
+++ b/Containerfile.common
@@ -6,10 +6,10 @@
 ARG SOURCE_IMAGE="${SOURCE_IMAGE:-base}"
 ARG SOURCE_ORG="${SOURCE_ORG:-fedora-ostree-desktops}"
 ARG BASE_IMAGE="quay.io/${SOURCE_ORG}/${SOURCE_IMAGE}"
-ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-39}"
+ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-40}"
 
 FROM ${BASE_IMAGE}:${FEDORA_MAJOR_VERSION} AS builder
-ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-39}"
+ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-40}"
 ARG KERNEL_FLAVOR="{KERNEL_FLAVOR:-main}"
 ARG KERNEL_VERSION=""
 ARG RPMFUSION_MIRROR=""
diff --git a/Containerfile.nvidia b/Containerfile.nvidia
index fffeb0b8..232feb50 100644
--- a/Containerfile.nvidia
+++ b/Containerfile.nvidia
@@ -6,10 +6,10 @@
 ARG SOURCE_IMAGE="${SOURCE_IMAGE:-base}"
 ARG SOURCE_ORG="${SOURCE_ORG:-fedora-ostree-desktops}"
 ARG BASE_IMAGE="quay.io/${SOURCE_ORG}/${SOURCE_IMAGE}"
-ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-39}"
+ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-40}"
 
 FROM ${BASE_IMAGE}:${FEDORA_MAJOR_VERSION} AS builder
-ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-39}"
+ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-40}"
 ARG KERNEL_FLAVOR="{KERNEL_FLAVOR:-main}"
 ARG KERNEL_VERSION=""
 ARG RPMFUSION_MIRROR=""
diff --git a/build-prep.sh b/build-prep.sh
index e1b5be00..d535a893 100755
--- a/build-prep.sh
+++ b/build-prep.sh
@@ -27,8 +27,8 @@ rpm-ostree install \
     ${RPMFUSION_MIRROR_RPMS}/nonfree/fedora/rpmfusion-nonfree-release-${RELEASE}.noarch.rpm \
     fedora-repos-archive
 
-# after F40 launches, bump to 41
-if [[ "${FEDORA_MAJOR_VERSION}" -ge 40 ]]; then
+# after F41 launches, bump to 42
+if [[ "${FEDORA_MAJOR_VERSION}" -ge 41 ]]; then
     # pre-release rpmfusion is in a different location
     sed -i "s%free/fedora/releases%free/fedora/development%" /etc/yum.repos.d/rpmfusion-*.repo
     # pre-release rpmfusion needs to enable testing