diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b0ddb9..4bb0735 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# v3.0.0 (TBD)
+
+Changes:
+
+- All enums are now marked as non-exhaustive, since the JMdict tends to add more variants as time goes on.
+
 # v2.0.0 (2021-07-19)
 
 JMdict was updated to 2021-09-17. This requires the following changes in enum variants:
diff --git a/jmdict-enums/build.rs b/jmdict-enums/build.rs
index b38e422..d0b56d4 100644
--- a/jmdict-enums/build.rs
+++ b/jmdict-enums/build.rs
@@ -390,6 +390,7 @@ fn process(e: Enum) -> String {
     //enum declaration
     lines.push(format!("/// {}", e.doc));
     lines.push("#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]".into());
+    lines.push("#[non_exhaustive]".into());
     lines.push(format!("pub enum {} {{", e.name));
     for v in e.variants.iter().filter(|v| v.enabled) {
         if let Some(ref entities) = e.entities {