diff --git a/src/main.rs b/src/main.rs
index 3839d88..ffed6e2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,5 @@
 use std::{
-    collections::{BTreeMap, HashMap},
+    collections::BTreeMap,
     fs::File,
     io::BufReader,
     num::NonZeroU8,
@@ -209,7 +209,7 @@ struct Report {
     #[serde(default)]
     savings: BTreeMap<String, f64>,
     #[serde(default)]
-    variable: HashMap<String, String>,
+    variable: BTreeMap<String, String>,
     #[serde(default)]
     earnings_1: f64,
     #[serde(default)]