diff --git a/changelog/next-release.md b/changelog/next-release.md
index 6280bde..ea178bf 100644
--- a/changelog/next-release.md
+++ b/changelog/next-release.md
@@ -7,3 +7,7 @@
   - `ProjectReference::setId()` now accepts `?string`
   - `ContractDocumentReference::setId()` now accepts `?string`
   - `InvoiceDocumentReference::setOriginalInvoiceId()` now accepts `?string`
+
+### Maintenance
+
+- Update dependency constraints to support Doctrine Collections 3.x
diff --git a/composer.json b/composer.json
index 691ceae..ece694b 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         "php": "^7.4 || ^8.0",
         "sabre/xml": "^4.0",
         "nesbot/carbon": "^2.72 || ^3.11",
-        "doctrine/collections": "^1.8 || ^2.0"
+        "doctrine/collections": "^1.8 || ^2.0 || ^3.0"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.7",