diff --git a/R/plots.R b/R/plots.R
index 9a6c4e4..6baad4a 100644
--- a/R/plots.R
+++ b/R/plots.R
@@ -105,7 +105,7 @@ plot_positions <- function(species_ids, gene_sets, reference_gene_ids = NULL) {
         ),
         hoverinfo = "text",
         marker = list(
-          size = 10,
+          size = 5,
           color = gene_set_color(index)
         )
       )