diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 511615b..1bec7dd 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -46,6 +46,8 @@ jobs:
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
+        env:
+          GKSwstype: "100" # https://discourse.julialang.org/t/generation-of-documentation-fails-qt-qpa-xcb-could-not-connect-to-display/60988
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1 
         with:
diff --git a/.github/workflows/Documenter.yml b/.github/workflows/Documenter.yml
index 4f4d6e8..1cc6591 100644
--- a/.github/workflows/Documenter.yml
+++ b/.github/workflows/Documenter.yml
@@ -22,4 +22,5 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # For authentication with GitHub Actions token
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }} # For authentication with SSH deploy key
+          GKSwstype: "100" # https://discourse.julialang.org/t/generation-of-documentation-fails-qt-qpa-xcb-could-not-connect-to-display/60988
         run: julia --project=docs/ docs/make.jl
\ No newline at end of file