diff --git a/Cargo.toml b/Cargo.toml
index e114468..8b277fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "unicode-joining-type"
-version = "0.7.0"
+version = "1.0.0-pre"
 authors = ["YesLogic Pty. Ltd. <info@yeslogic.com>"]
 edition = "2018"
 
diff --git a/src/joining_group_tables.rs b/src/joining_group_tables.rs
index 42c33a1..80695b3 100644
--- a/src/joining_group_tables.rs
+++ b/src/joining_group_tables.rs
@@ -6,6 +6,7 @@
 //
 // yeslogic-ucd-generate 0.7.0 is available on crates.io.
 
+#[non_exhaustive]
 #[derive(Clone, Copy, Debug, Hash, Eq, PartialEq)]
 pub enum JoiningGroup {
     AfricanFeh,
diff --git a/src/joining_type_tables.rs b/src/joining_type_tables.rs
index 07608a8..8a1c569 100644
--- a/src/joining_type_tables.rs
+++ b/src/joining_type_tables.rs
@@ -6,6 +6,7 @@
 //
 // yeslogic-ucd-generate 0.7.0 is available on crates.io.
 
+#[non_exhaustive]
 #[derive(Clone, Copy, Debug, Hash, Eq, PartialEq)]
 pub enum JoiningType {
     DualJoining,