diff --git a/build.gradle b/build.gradle
index f998661e..334c1fce 100644
--- a/build.gradle
+++ b/build.gradle
@@ -480,6 +480,9 @@ configure(sampleProjects()) {
 		testCompile "org.hamcrest:hamcrest-library"
 		testCompile "junit:junit"
 	}
+	bootJar {
+		excludeDevtools = false
+	}
 	build.dependsOn bootJar
 }
 
diff --git a/spring-statemachine-samples/datajpa/src/main/resources/application.yml b/spring-statemachine-samples/datajpa/src/main/resources/application.yml
index d560ab3a..feb51966 100644
--- a/spring-statemachine-samples/datajpa/src/main/resources/application.yml
+++ b/spring-statemachine-samples/datajpa/src/main/resources/application.yml
@@ -4,3 +4,7 @@ logging:
 security:
   basic:
     enabled: false
+spring:
+  h2:
+    console:
+      enabled: true
diff --git a/spring-statemachine-samples/datajpamultipersist/src/main/resources/application.yml b/spring-statemachine-samples/datajpamultipersist/src/main/resources/application.yml
index e787bce1..14da8c67 100644
--- a/spring-statemachine-samples/datajpamultipersist/src/main/resources/application.yml
+++ b/spring-statemachine-samples/datajpamultipersist/src/main/resources/application.yml
@@ -5,3 +5,7 @@ logging:
 security:
   basic:
     enabled: false
+spring:
+  h2:
+    console:
+      enabled: true
diff --git a/spring-statemachine-samples/datapersist/src/main/resources/application.yml b/spring-statemachine-samples/datapersist/src/main/resources/application.yml
index 371ff1c8..5c16dccf 100644
--- a/spring-statemachine-samples/datapersist/src/main/resources/application.yml
+++ b/spring-statemachine-samples/datapersist/src/main/resources/application.yml
@@ -4,6 +4,9 @@ logging:
 spring:
   profiles:
     active: jpa
+  h2:
+    console:
+      enabled: true
 security:
   basic:
     enabled: false