diff --git a/src/main/resources/application-sim.yml b/src/main/resources/application-sim.yml
index a802dcc..83a97c2 100644
--- a/src/main/resources/application-sim.yml
+++ b/src/main/resources/application-sim.yml
@@ -50,7 +50,7 @@ spring:
         minIdle: 1
         timeBetweenEvictionRunsMillis: 60000
         minEvictableIdleTimeMillis: 300000
-        validationQuery: select 1
+        validationQuery: SELECT 1
         testWhileIdle: true
         testOnBorrow: false
         testOnReturn: false