diff --git a/README.md b/README.md
index 6eaf8f9..f63846a 100644
--- a/README.md
+++ b/README.md
@@ -226,6 +226,10 @@ If you choose this path, you can install this package in the following steps:
 ```
 Then depending on the version of doctrine/orm you want to use:
 
+Doctrine 3:
+- run `composer require sspat/doctrine-nullable-embeddables:v3.3.0 doctrine/orm:3.3.0`
+
+Doctrine 2:
 - run `composer require sspat/doctrine-nullable-embeddables:v2.20.0 doctrine/orm:2.20.0`
 - run `composer require sspat/doctrine-nullable-embeddables:v2.19.8 doctrine/orm:2.19.8`
 - run `composer require sspat/doctrine-nullable-embeddables:v2.19.7 doctrine/orm:2.19.7`
diff --git a/composer.json b/composer.json
index e70bdb5..5a3cf91 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "require": {
         "php": "^7.4|^8.0",
         "cweagans/composer-patches": "^1.6|^1.7",
-        "doctrine/orm": "2.20.0"
+        "doctrine/orm": "3.3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5"
@@ -31,7 +31,7 @@
     "extra": {
         "patches": {
             "doctrine/orm": {
-                "Allow nullable embeddables": "https://raw.githubusercontent.com/sspat/doctrine-nullable-embeddables/v2.20.0/patch/nullable_embeddables.patch"
+                "Allow nullable embeddables": "https://raw.githubusercontent.com/sspat/doctrine-nullable-embeddables/v3.3.0/patch/nullable_embeddables.patch"
             }
         }
     },