diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index adeaa9b1..49913634 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,10 +54,10 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: julia-actions/setup-julia@latest
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
         with:
-          version: '1.4'
+          version: '1.6'
       - run: julia --project=docs -e '
           using Pkg;
           Pkg.develop(PackageSpec(; path=pwd()));