diff --git a/application/module-certificate/src/main/java/org/fuseri/modulecertificate/ModuleCertificateApplication.java b/application/module-certificate/src/main/java/org/fuseri/modulecertificate/ModuleCertificateApplication.java
index f33ef339f326af9500f06011df01ab52a708b1af..230c9e6eeeb8b3259921eb822f29b7bd3432dea6 100644
--- a/application/module-certificate/src/main/java/org/fuseri/modulecertificate/ModuleCertificateApplication.java
+++ b/application/module-certificate/src/main/java/org/fuseri/modulecertificate/ModuleCertificateApplication.java
@@ -6,8 +6,6 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 @SpringBootApplication
 public class ModuleCertificateApplication {
 
-    //mvn clean install
-    //java -jar .\module-certificate\target\module-certificate-0.0.1-SNAPSHOT.jar
     public static void main(String[] args) {
         SpringApplication.run(ModuleCertificateApplication.class, args);
     }
diff --git a/application/module-certificate/src/main/resources/application.properties b/application/module-certificate/src/main/resources/application.properties
index 8b137891791fe96927ad78e64b0aad7bded08bdc..17abda7ad394e3595b5f09d64de61a54cf12235e 100644
--- a/application/module-certificate/src/main/resources/application.properties
+++ b/application/module-certificate/src/main/resources/application.properties
@@ -1 +1 @@
-
+server.port=5001
\ No newline at end of file
diff --git a/application/module-exercise/src/main/resources/application.properties b/application/module-exercise/src/main/resources/application.properties
index 8b137891791fe96927ad78e64b0aad7bded08bdc..ec3c390e0877b6c499b7aade0abc0111d719d865 100644
--- a/application/module-exercise/src/main/resources/application.properties
+++ b/application/module-exercise/src/main/resources/application.properties
@@ -1 +1 @@
-
+server.port=5002
\ No newline at end of file
diff --git a/application/module-language-school/src/main/resources/application.properties b/application/module-language-school/src/main/resources/application.properties
index f6719f5b0390d020b4d73ba6349bf79f92a3c7c2..888dcec44dfa5c7cece2f03962df19175a89349e 100644
--- a/application/module-language-school/src/main/resources/application.properties
+++ b/application/module-language-school/src/main/resources/application.properties
@@ -1,8 +1 @@
-spring:
-    datasource:
-        url: jdbc:h2:mem:exampleDb
-        username: sa
-        password: password
-        driverClassName: org.h2.Driver
-    jpa:
-        database-platform: org.hibernate.dialect.H2Dialect
+server.port=5000
\ No newline at end of file
diff --git a/application/module-mail/src/main/resources/application.properties b/application/module-mail/src/main/resources/application.properties
index 59c05327cf5d2cc3ea272498cab107cf4dbc37d8..bbd88e6aa778e3e0199bc86f9d1397fef90e4aa8 100644
--- a/application/module-mail/src/main/resources/application.properties
+++ b/application/module-mail/src/main/resources/application.properties
@@ -1,3 +1,4 @@
+server.port=5003
 spring.mail.host=smtp.gmail.com
 spring.mail.port=587
 spring.mail.username=sprachschul@gmail.com
diff --git a/application/pom.xml b/application/pom.xml
index 11c1c12c0a09887c996429d551d632c46f3260e1..15b19af1750257007e2a1ff98ae1ddee202b673c 100644
--- a/application/pom.xml
+++ b/application/pom.xml
@@ -115,6 +115,9 @@
                 <plugin>
                     <groupId>org.springframework.boot</groupId>
                     <artifactId>spring-boot-maven-plugin</artifactId>
+                    <configuration>
+                        <skip>true</skip>
+                    </configuration>
                 </plugin>
 
                 <plugin>