diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 716a89a..b7ffb40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,6 +75,9 @@ jobs:
         with:
           path: docs/${{ matrix.notebook }}
           key: ${{ runner.os }}-notebook-${{ hashFiles(format('docs/{0}', matrix.notebook)) }}-${{ needs.setup.outputs.hash }}
+      - name: Install Julia kernel
+        if: ${{ steps.cache.outputs.cache-hit != 'true' }}
+        run: julia -e 'import IJulia; IJulia.installkernel("Julia", "--project=@.")'
       - name: Execute Notebook
         if: ${{ steps.cache.outputs.cache-hit != 'true' }}
         run: >
diff --git a/setup.jl b/setup.jl
index 8c3c982..ad8188a 100644
--- a/setup.jl
+++ b/setup.jl
@@ -1,10 +1,6 @@
 using Pkg
 Pkg.add(["IJulia"])
 
-import IJulia
-IJulia.installkernel("Julia", "--project=@.")
-
 Pkg.activate(".")
 Pkg.instantiate()
 Pkg.precompile()
-Pkg.gc()