diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ac1f2cd68..8f35a9701 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -530,7 +530,7 @@ jobs:
       fail-fast: false
       matrix:
         box:
-          - fedora/37-cloud-base
+          - fedora/38-cloud-base
           # v7.0.0 does not boot. v6.0.0 was not released.
           - rockylinux/8@5.0.0
     env:
diff --git a/Vagrantfile b/Vagrantfile
index b3f20669c..b8e53ca70 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -17,7 +17,7 @@
 
 # Vagrantfile for Fedora and EL
 Vagrant.configure("2") do |config|
-  config.vm.box = ENV["BOX"] ? ENV["BOX"].split("@")[0] : "fedora/37-cloud-base"
+  config.vm.box = ENV["BOX"] ? ENV["BOX"].split("@")[0] : "fedora/38-cloud-base"
   # BOX_VERSION is deprecated. Use "BOX=<BOX>@<BOX_VERSION>".
   config.vm.box_version = ENV["BOX_VERSION"] || (ENV["BOX"].split("@")[1] if ENV["BOX"])