diff --git a/.github/workflows/runcodechunks_vignette.yml b/.github/workflows/runcodechunks_vignette.yml
index 19d9442..5efff12 100644
--- a/.github/workflows/runcodechunks_vignette.yml
+++ b/.github/workflows/runcodechunks_vignette.yml
@@ -24,7 +24,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-${{ matrix.config.mlr3 }}-1-${{ hashFiles('.github/depends.Rds') }}
diff --git a/.github/workflows/runreplication.yml b/.github/workflows/runreplication.yml
index e878d8e..b1425a5 100644
--- a/.github/workflows/runreplication.yml
+++ b/.github/workflows/runreplication.yml
@@ -24,7 +24,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-${{ matrix.config.mlr3 }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -76,12 +76,12 @@ jobs:
           source("Code/sim_iivm.R")
         shell: Rscript {0}
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: sim-results
           path: ./simresults/
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: sim-results
           path: ./simresults/
@@ -91,7 +91,7 @@ jobs:
           source("Code/merge_plots.R")
         shell: Rscript {0}
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: sim-results
           path: |
diff --git a/.github/workflows/runreplication_key_ingredients.yml b/.github/workflows/runreplication_key_ingredients.yml
index 9c08618..46c186f 100644
--- a/.github/workflows/runreplication_key_ingredients.yml
+++ b/.github/workflows/runreplication_key_ingredients.yml
@@ -24,7 +24,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-${{ matrix.config.mlr3 }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -61,7 +61,7 @@ jobs:
           source("Code/examples_failure_n_500_p_20.R")
         shell: Rscript {0}
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: sim-results
           path: |
diff --git a/.github/workflows/runreplication_sim_inf.yml b/.github/workflows/runreplication_sim_inf.yml
index b4370c4..7277901 100644
--- a/.github/workflows/runreplication_sim_inf.yml
+++ b/.github/workflows/runreplication_sim_inf.yml
@@ -24,7 +24,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-${{ matrix.config.mlr3 }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -61,9 +61,9 @@ jobs:
           source("Code/sim_siminf.R")
         shell: Rscript {0}
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
-          name: sim-siminf-results
+          name: sim-siminf-results-final
           path: ./simresults/
 
       - name: Session info
diff --git a/Code/doubleml_codechunks.R b/Code/doubleml_codechunks.R
index c669193..3a3998b 100644
--- a/Code/doubleml_codechunks.R
+++ b/Code/doubleml_codechunks.R
@@ -244,11 +244,8 @@ doubleml_plr = DoubleMLPLR$new(doubleml_data, ml_l, ml_m)
 
 ## ---- eval = TRUE-----------------------------------------------------------------------------------------
 par_grids = list(
-  "ml_l" = ParamSet$new(list(
-    ParamDbl$new("lambda", lower = 0.05, upper = 0.1))),
-  "ml_m" = ParamSet$new(list(
-    ParamDbl$new("lambda", lower = 0.05, upper = 0.1))))
-
+  "ml_l" = ps(lambda = p_dbl(lower = 0.05, upper = 0.1)),
+  "ml_m" = ps(lambda = p_dbl(lower = 0.05, upper = 0.1)))
 
 ## ---- eval = TRUE-----------------------------------------------------------------------------------------
 # Provide tune settings