diff --git a/milli/Cargo.toml b/milli/Cargo.toml
index fd7bde99b..b2cebb95d 100644
--- a/milli/Cargo.toml
+++ b/milli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "milli"
-edition = "2018"
+edition = "2021"
 publish = false
 
 version.workspace = true
diff --git a/milli/src/snapshot_tests.rs b/milli/src/snapshot_tests.rs
index d79003747..6635ab2f4 100644
--- a/milli/src/snapshot_tests.rs
+++ b/milli/src/snapshot_tests.rs
@@ -535,7 +535,7 @@ pub fn convert_snap_to_hash_if_needed<'snap>(
 
 #[macro_export]
 macro_rules! make_db_snap_from_iter {
-    ($index:ident, $name:ident, |$vars:pat| $push:block) => {{
+    ($index:ident, $name:ident, |$vars:pat_param| $push:block) => {{
         let rtxn = $index.read_txn().unwrap();
         let iter = $index.$name.iter(&rtxn).unwrap();
         let mut snap = String::new();