diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65ea3c7..80066ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [0.1.31](https://github.com/dankreiger/groop/compare/v0.1.30...v0.1.31) (2024-04-11)
+
+
+### Bug Fixes
+
+* make first input into a readonly array ([#156](https://github.com/dankreiger/groop/issues/156)) ([8efb1f1](https://github.com/dankreiger/groop/commit/8efb1f1040c75be1610d64525f170f37de6fdb8b))
+
 ## [0.1.30](https://github.com/dankreiger/groop/compare/v0.1.29...v0.1.30) (2024-04-11)
 
 
diff --git a/package.json b/package.json
index 16846f2..a50bbbd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@dankreiger/groop",
-  "version": "0.1.30",
+  "version": "0.1.31",
   "description": "Normalize an array of objects by a property.",
   "homepage": "https://github.com/dankreiger/groop#readme",
   "bugs": {