diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6428437..1086387 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -24,12 +24,12 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@v1
+      - uses: actions/checkout@v5
+      - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         env:
           cache-name: cache-artifacts
         with:
@@ -42,6 +42,6 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v5
         with:
           file: lcov.info
diff --git a/src/adaptivesampling.jl b/src/adaptivesampling.jl
index 74111bb..3462101 100644
--- a/src/adaptivesampling.jl
+++ b/src/adaptivesampling.jl
@@ -9,8 +9,12 @@ function adaptivesampling!(root::Cell, refinery::AbstractRefinery)
         (cell, indices) -> refine_data(refinery, cell, indices)
     while !isempty(refinement_queue)
         cell = pop!(refinement_queue)
-        if needs_refinement(refinery, cell)
-            split!(cell, refine_function)
+        if isleaf(cell)
+            if needs_refinement(refinery, cell)
+                split!(cell, refine_function)
+                append!(refinement_queue, children(cell))
+            end
+        else
             append!(refinement_queue, children(cell))
         end
     end