diff --git a/.github/workflows/check-standard.yaml b/.github/workflows/check-standard.yaml
index 70aa64f..e7fe3ea 100644
--- a/.github/workflows/check-standard.yaml
+++ b/.github/workflows/check-standard.yaml
@@ -47,7 +47,7 @@ jobs:
       TZ: 'America/Denver'
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
@@ -70,6 +70,9 @@ jobs:
           needs: check
 
       - uses: r-lib/actions/check-r-package@v2
+        env:
+          LC_ALL: en_US.UTF-8
+          LANG: en_US.UTF-8
         with:
           args: 'c("--no-manual", "--as-cran", "--no-build-vignettes", "--timings")'
           build_args: 'c("--no-manual", "--no-resave-data")'
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index c010b50..c6affb8 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -21,7 +21,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
diff --git a/.github/workflows/render-readme.yaml b/.github/workflows/render-readme.yaml
index 904f198..3220207 100644
--- a/.github/workflows/render-readme.yaml
+++ b/.github/workflows/render-readme.yaml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index 6e5835a..6607de9 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -29,7 +29,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2
         with:
diff --git a/R/s3-stab-sel.R b/R/s3-stab-sel.R
index 3c84fcb..5549be2 100644
--- a/R/s3-stab-sel.R
+++ b/R/s3-stab-sel.R
@@ -194,8 +194,9 @@ plot.stab_sel <- function(x, thresh = 0.60,
   lambda_norm <- x$lambda / max(x$lambda)
 
   if ( is.null(main) ) {
-    main <- sprintf("Stability Paths (\u03B1 = %0.2f, P(\u03B1) = %0.2f)",
-                    x$alpha, x$Pw)
+    main <- bquote(
+      "Stability Paths (" * alpha == .(x$alpha) *
+        "," ~ italic(P)(alpha) == .(x$Pw) * ")")
   }
 
   custom_features <- intersect(custom_labels, rownames(x$stabpath_matrix))
@@ -263,7 +264,7 @@ plot.stab_sel <- function(x, thresh = 0.60,
     geom_hline(yintercept = thresh, alpha = 0.75,
                colour = "black", linetype = "dashed") +
     guides(colour = guide_legend(title = "Feature", ncol = legend_cols)) +
-    labs(x = "\u03BB / max(\u03BB)",
+    labs(x = bquote(lambda ~ "/" ~ max()(lambda)),
          y = "Selection Probability",
          title = main) +
     theme(legend.position = "right")