diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 91565149..1208424e 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -38,7 +38,6 @@ jobs:
         with:
           r-version: ${{ matrix.config.r }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
-          use-public-rspm: true
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index f16962e5..3c0e4e5e 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -23,13 +23,11 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v2
-        with:
-          use-public-rspm: true
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
@@ -42,7 +40,7 @@ jobs:
 
       - name: Deploy to GitHub pages 🚀
         if: github.event_name != 'pull_request'
-        uses: JamesIves/github-pages-deploy-action@v4.5.0
+        uses: JamesIves/github-pages-deploy-action@d92aa235d04922e8f08b40ce78cc5442fcfbfa2f # v4.8.0
         with:
           clean: false
           branch: gh-pages
diff --git a/DESCRIPTION b/DESCRIPTION
index c1db6cbf..3aed1427 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -9,8 +9,6 @@ Authors@R:
 Description: Implements information-theoretic measures to explore variable interactions, including KSG mutual information estimation for continuous variables from Kraskov et al. (2004) <doi:10.1103/PhysRevE.69.066138>, knockoff conditional mutual information described in Zhang & Chen (2025) <doi:10.1126/sciadv.adu6464>, synergistic-unique-redundant decomposition introduced by Martinez-Sanchez et al. (2024) <doi:10.1038/s41467-024-53373-4>, allowing detection of complex and diverse relationships among variables.
 License: GPL-3
 Encoding: UTF-8
-Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.3
 URL: https://stscl.github.io/infoxtr/, https://github.com/stscl/infoxtr
 BugReports: https://github.com/stscl/infoxtr/issues
 Depends: 
@@ -32,3 +30,5 @@ Suggests:
     spEDM,
     tEDM
 VignetteBuilder: knitr
+Config/roxygen2/markdown: TRUE
+Config/roxygen2/version: 8.0.0
diff --git a/R/zzz.R b/R/zzz.R
index 14aa91c3..5e0ab5a4 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -1,4 +1,3 @@
 .onLoad = function(...) {
-  loadNamespace("sf")
-  loadNamespace("terra")
+  if (requireNamespace("Rcpp", quietly = TRUE)) loadNamespace("Rcpp")
 }