diff --git a/.github/workflows/phpunit-extensions.yml b/.github/workflows/phpunit-extensions.yml
index a1bf4abd..e76a7bc4 100644
--- a/.github/workflows/phpunit-extensions.yml
+++ b/.github/workflows/phpunit-extensions.yml
@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 15
     strategy:
       matrix:
-        postgres_version: [ 15, 16, 17 ]
+        postgres_version: [ 15, 16, 17, 18 ]
 
     services:
       pgsql_test:
diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 6d16a175..802532c6 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        postgres_version: [ 15, 16, 17 ]
+        postgres_version: [ 15, 16, 17, 18 ]
 
     services:
       pgsql_test: