diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index 5f31712a..cecf6b74 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -15,7 +15,7 @@ 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/visualization.R b/R/visualization.R
index 44666197..5e64056f 100644
--- a/R/visualization.R
+++ b/R/visualization.R
@@ -86,9 +86,9 @@ createAccuracyGraph <- function(fileRDS, title="",
         scale_colour_manual(aesthetics = c("colour", "fill"), 
                 breaks=selectD, values=selectColor) +
         theme_classic() +
-        theme(axis.text=element_text(size=1, colour = "white"),
+        theme(axis.text=element_text(size=20, colour = "black"),
             panel.background = element_rect(color="black"),
-            axis.text.x=element_text(size=30, angle=90, 
+            axis.text.x=element_text(size=20, angle=90, 
                     vjust = 0.5, hjust=1, colour="black"),
             plot.title = element_text(size=22, face="bold", 
                     colour="gray20", hjust=0.5),