diff --git a/.config/mise.toml b/.config/mise.toml
index 5f0e2b4..b533d52 100644
--- a/.config/mise.toml
+++ b/.config/mise.toml
@@ -12,7 +12,7 @@ PULUMI_HOME = "{{config_root}}/.pulumi"
 go = "{{ get_env(name='GO_VERSION_MISE', default='latest') }}"
 node = '20.19.5'
 python = '3.11.8'
-dotnet = '8.0.414'
+"vfox:version-fox/vfox-dotnet" = "8.0.20" # vfox backend doesn't work on Windows, gives "error converting Lua table to PreInstall (no version returned from vfox plugin)" https://github.com/jdx/mise/discussions/5876 https://github.com/jdx/mise/discussions/5550
 # Corretto version used as Java SE/OpenJDK version no longer offered
 java = 'corretto-11'
 
diff --git a/.github/actions/setup-tools/action.yml b/.github/actions/setup-tools/action.yml
index c39d021..743d7dc 100644
--- a/.github/actions/setup-tools/action.yml
+++ b/.github/actions/setup-tools/action.yml
@@ -18,7 +18,7 @@ runs:
       env:
         MISE_FETCH_REMOTE_VERSIONS_TIMEOUT: 30s
       with:
-        version: 2025.11.6
+        version: 2026.1.1
         cache_save: ${{ inputs.cache }}
         github_token: ${{ inputs.github_token }}
         plugin_install: https://github.com/pulumi/vfox-pulumi