diff --git a/src/DoctrineMessageRepository/composer.json b/src/DoctrineMessageRepository/composer.json
index 21ee01b..a349acf 100644
--- a/src/DoctrineMessageRepository/composer.json
+++ b/src/DoctrineMessageRepository/composer.json
@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "doctrine/dbal": "^3.1",
+        "doctrine/dbal": "^3.1|^4.0",
         "eventsauce/eventsauce": "^3.0",
         "eventsauce/message-repository-table-schema": "^1.0",
         "eventsauce/uuid-encoding": "^1.0",
diff --git a/src/DoctrineOutbox/composer.json b/src/DoctrineOutbox/composer.json
index 20810fd..c83075e 100644
--- a/src/DoctrineOutbox/composer.json
+++ b/src/DoctrineOutbox/composer.json
@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "doctrine/dbal": "^3.1",
+        "doctrine/dbal": "^3.1|^4.0",
         "eventsauce/eventsauce": "^3.0",
         "eventsauce/message-outbox": "^1.0"
     },