diff --git a/.appveyor.yml b/.appveyor.yml
index 8ea1073a04e..8b7b69aa1b4 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -43,7 +43,7 @@ environment:
 services:
         # the setup scripts have to be touched, once some other db version is used
         - mysql
-        - postgresql10
+        - postgresql96
 
 platform:
         - x64
diff --git a/appveyor/test_task.bat b/appveyor/test_task.bat
index eee4a94295b..60eb6dc164a 100644
--- a/appveyor/test_task.bat
+++ b/appveyor/test_task.bat
@@ -37,7 +37,7 @@ set PGPASSWORD=Password12!
 rem set PGSQL_TEST_CONNSTR=host=127.0.0.1 dbname=test port=5432 user=postgres password=Password12!
 echo ^<?php $conn_str = "host=127.0.0.1 dbname=test port=5432 user=%PGUSER% password=%PGPASSWORD%"; ?^> >> "./ext/pgsql/tests/config.inc"
 set PDO_PGSQL_TEST_DSN=pgsql:host=127.0.0.1 port=5432 dbname=test user=%PGUSER% password=%PGPASSWORD%
-"C:\Program Files\PostgreSQL\10\bin\createdb.exe" test
+"C:\Program Files\PostgreSQL\9.6\bin\createdb.exe" test
 if %errorlevel% neq 0 exit /b 3
 
 rem prepare for ext/openssl