diff --git a/repology-webapp/src/views/badges/vertical_allrepos.rs b/repology-webapp/src/views/badges/vertical_allrepos.rs
index 662d02b..499d8b0 100644
--- a/repology-webapp/src/views/badges/vertical_allrepos.rs
+++ b/repology-webapp/src/views/badges/vertical_allrepos.rs
@@ -32,6 +32,7 @@ pub struct QueryParams {
     #[serde(deserialize_with = "crate::query::deserialize_bool_flag")]
     pub allow_ignored: bool,
     #[serde(default)]
+    #[serde(rename = "columns")]
     pub columns_count: usize,
 
     #[serde(default)]
diff --git a/repology-webapp/tests/badges.rs b/repology-webapp/tests/badges.rs
index c385824..629dc01 100644
--- a/repology-webapp/tests/badges.rs
+++ b/repology-webapp/tests/badges.rs
@@ -204,7 +204,7 @@ async fn test_badge_vertical_allrepos(pool: PgPool) {
     // columns
     check_svg!(
         pool,
-        "/badge/vertical-allrepos/zsh.svg?columns_count=4",
+        "/badge/vertical-allrepos/zsh.svg?columns=4",
         @"string(//svg:g[1]/svg:g[@font-size=11][1]/svg:text[1])" == "FreeBSD",
         @"string(//svg:g[1]/svg:g[@font-size=11][1]/svg:text[3])" == "1.1",
         @"string(//svg:g[1]/svg:g[@font-size=11][1]/svg:text[5])" == "freshcode.club",