diff --git a/R/visualization.R b/R/visualization.R
index 52033b3a1..fbbfae8cb 100644
--- a/R/visualization.R
+++ b/R/visualization.R
@@ -6430,7 +6430,7 @@ CenterTitle <- function(...) {
 DarkTheme <- function(...) {
   #   Some constants for easier changing in the future
   black.background <- element_rect(fill = 'black')
-  black.background.no.border <- element_rect(fill = 'black', size = 0)
+  black.background.no.border <- element_rect(fill = 'black', linewidth = 0)
   font.margin <- 4
   white.text <- element_text(
     colour = 'white',
@@ -6441,8 +6441,8 @@ DarkTheme <- function(...) {
       l = font.margin
     )
   )
-  white.line <- element_line(colour = 'white', size = 1)
-  no.line <- element_line(size = 0)
+  white.line <- element_line(colour = 'white', linewidth = 1)
+  no.line <- element_line(linewidth = 0)
   #   Create the dark theme
   dark.theme <- theme(
     #   Set background colors
@@ -9236,7 +9236,7 @@ SingleImagePlot <- function(
         geom_polygon(
           mapping = aes(group = .data[['cell']]),
           color = border.color,
-          size = border.size
+          linewidth = border.size
         )
       } else {
         # Default to no borders when plotting centroids