diff --git a/app/views/contests/_category_selector.html.slim b/app/views/contests/_category_selector.html.slim
index 395d3ba..2ac3d2e 100644
--- a/app/views/contests/_category_selector.html.slim
+++ b/app/views/contests/_category_selector.html.slim
@@ -15,5 +15,5 @@
           if (option.value == selectedCategory) option.selected = true;
         });
         categorySelectEl.addEventListener('change', (e) => {
-          window.location.href = `/public/#{@contest.slug}?category=${e.target.value}`
+          window.location.replace(`/public/#{@contest.slug}?category=${e.target.value}`);
         })
\ No newline at end of file
diff --git a/app/views/contests/show.html.slim b/app/views/contests/show.html.slim
index 98bec3f..a85640d 100644
--- a/app/views/contests/show.html.slim
+++ b/app/views/contests/show.html.slim
@@ -61,7 +61,7 @@ javascript:
               if (option.value == selectedCategory) option.selected = true;
             });
             categorySelectEl.addEventListener('change', (e) => {
-              window.location.href = `#{contest_path(@contest)}?category=${e.target.value}`
+              window.location.replace(`#{contest_path(@contest)}?category=${e.target.value}`);
             })
     .d-flex.flex-column style="overflow-y: auto"
       table.table.table-striped.table-hover