diff --git a/examples/grails3-hibernate5-mongodb/grails-app/init/BootStrap.groovy b/examples/grails3-hibernate5-mongodb/grails-app/init/BootStrap.groovy
index d8dcad01..e1355fb6 100644
--- a/examples/grails3-hibernate5-mongodb/grails-app/init/BootStrap.groovy
+++ b/examples/grails3-hibernate5-mongodb/grails-app/init/BootStrap.groovy
@@ -1,10 +1,14 @@
 import functional.tests.*
+import jakarta.servlet.ServletContext
 
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     	Book.DB.drop()
     }
+
     def destroy = {
     }
 }
diff --git a/examples/grails3-mongodb-database-per-tenant/grails-app/init/BootStrap.groovy b/examples/grails3-mongodb-database-per-tenant/grails-app/init/BootStrap.groovy
index 318b9be1..23f65279 100644
--- a/examples/grails3-mongodb-database-per-tenant/grails-app/init/BootStrap.groovy
+++ b/examples/grails3-mongodb-database-per-tenant/grails-app/init/BootStrap.groovy
@@ -1,13 +1,15 @@
+import jakarta.servlet.ServletContext
 import org.grails.datastore.mapping.mongo.MongoDatastore
-import org.springframework.beans.factory.annotation.Autowired
 
 class BootStrap {
 
-    @Autowired MongoDatastore mongoDatastore
+    ServletContext servletContext
+    MongoDatastore mongoDatastore
 
-    def init = { servletContext ->
-    	mongoDatastore.mongoClient.getDatabase( mongoDatastore.defaultDatabase ).drop()
+    def init = {
+        mongoDatastore.mongoClient.getDatabase(mongoDatastore.defaultDatabase).drop()
     }
+
     def destroy = {
     }
 }
diff --git a/examples/grails3-mongodb/grails-app/init/BootStrap.groovy b/examples/grails3-mongodb/grails-app/init/BootStrap.groovy
index d8dcad01..e1355fb6 100644
--- a/examples/grails3-mongodb/grails-app/init/BootStrap.groovy
+++ b/examples/grails3-mongodb/grails-app/init/BootStrap.groovy
@@ -1,10 +1,14 @@
 import functional.tests.*
+import jakarta.servlet.ServletContext
 
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     	Book.DB.drop()
     }
+
     def destroy = {
     }
 }
diff --git a/examples/gson-templates/grails-app/init/BootStrap.groovy b/examples/gson-templates/grails-app/init/BootStrap.groovy
index 03ea8f95..cd06c703 100644
--- a/examples/gson-templates/grails-app/init/BootStrap.groovy
+++ b/examples/gson-templates/grails-app/init/BootStrap.groovy
@@ -1,8 +1,11 @@
 import groovy.transform.CompileStatic
+import jakarta.servlet.ServletContext
 
 @CompileStatic
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     }
 }
diff --git a/examples/test-data-service/grails-app/init/example/BootStrap.groovy b/examples/test-data-service/grails-app/init/example/BootStrap.groovy
index 72406d5c..71ba0d21 100644
--- a/examples/test-data-service/grails-app/init/example/BootStrap.groovy
+++ b/examples/test-data-service/grails-app/init/example/BootStrap.groovy
@@ -1,9 +1,14 @@
 package example
 
+import jakarta.servlet.ServletContext
+
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     }
+
     def destroy = {
     }
 }