diff --git a/examples/grails3-database-per-tenant/grails-app/conf/application.yml b/examples/grails3-database-per-tenant/grails-app/conf/application.yml
index fb75bfdec..21ef8d77e 100644
--- a/examples/grails3-database-per-tenant/grails-app/conf/application.yml
+++ b/examples/grails3-database-per-tenant/grails-app/conf/application.yml
@@ -9,9 +9,11 @@ info:
         version: '@info.app.version@'
         grailsVersion: '@info.app.grailsVersion@'
 spring:
-    groovy:
+  groovy:
         template:
             check-template-location: false
+  main:
+    allow-circular-references: true
 
 ---
 grails:
diff --git a/examples/grails3-hibernate5/grails-app/conf/application.yml b/examples/grails3-hibernate5/grails-app/conf/application.yml
index 6a650e0b1..d84ca03ba 100644
--- a/examples/grails3-hibernate5/grails-app/conf/application.yml
+++ b/examples/grails3-hibernate5/grails-app/conf/application.yml
@@ -9,9 +9,11 @@ info:
         version: '@info.app.version@'
         grailsVersion: '@info.app.grailsVersion@'
 spring:
-    groovy:
+  groovy:
         template:
             check-template-location: false
+  main:
+    allow-circular-references: true
 
 ---
 grails:
diff --git a/examples/grails3-multiple-datasources/grails-app/conf/application.yml b/examples/grails3-multiple-datasources/grails-app/conf/application.yml
index 8e0027440..7661307be 100644
--- a/examples/grails3-multiple-datasources/grails-app/conf/application.yml
+++ b/examples/grails3-multiple-datasources/grails-app/conf/application.yml
@@ -12,6 +12,8 @@ spring:
     groovy:
         template:
             check-template-location: false
+    main:
+        allow-circular-references: true
 
 ---
 grails:
diff --git a/examples/grails3-partitioned-multi-tenancy/grails-app/conf/application.yml b/examples/grails3-partitioned-multi-tenancy/grails-app/conf/application.yml
index ec3b3b573..2f74aaeeb 100644
--- a/examples/grails3-partitioned-multi-tenancy/grails-app/conf/application.yml
+++ b/examples/grails3-partitioned-multi-tenancy/grails-app/conf/application.yml
@@ -9,10 +9,11 @@ info:
         version: '@info.app.version@'
         grailsVersion: '@info.app.grailsVersion@'
 spring:
-    groovy:
+  groovy:
         template:
             check-template-location: false
-
+  main:
+    allow-circular-references: true
 ---
 grails:
     mime:
diff --git a/examples/grails3-schema-per-tenant/grails-app/conf/application.yml b/examples/grails3-schema-per-tenant/grails-app/conf/application.yml
index 8e80c6cbf..7904eefd8 100644
--- a/examples/grails3-schema-per-tenant/grails-app/conf/application.yml
+++ b/examples/grails3-schema-per-tenant/grails-app/conf/application.yml
@@ -12,6 +12,8 @@ spring:
     groovy:
         template:
             check-template-location: false
+    main:
+      allow-circular-references: true
 
 ---
 grails:
diff --git a/gradle.properties b/gradle.properties
index 2426ed79f..6b55a46ff 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -21,7 +21,7 @@ servletApiVersion=4.0.1
 slf4jVersion=1.7.32
 snakeyamlVersion=1.29
 spockVersion=2.0-groovy-3.0
-springBootVersion=2.5.6
+springBootVersion=2.6.1
 springVersion=5.3.13
 tomcatLog4jVersion=8.5.2
 tomcatVersion=9.0.55
@@ -29,11 +29,10 @@ webdriverBinariesVersion=1.4
 
 # Following are used only for example projects
 fieldsVersion=3.0.0.RC1
-grailsVersion=5.0.0
-micrometer.version=1.6.1
+grailsVersion=5.1.0-SNAPSHOT
+micrometer.version=1.8.0
 scaffoldingVersion=4.0.0.RC1
-testingSupportVersion=2.2.0
-
+testingSupportVersion=2.2.1-SNAPSHOT
 org.gradle.caching=true
 org.gradle.parallel=true
-org.gradle.daemon=true
\ No newline at end of file
+org.gradle.daemon=true