diff --git a/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-report/pom.xml b/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-report/pom.xml
index d6f5141..c38a645 100644
--- a/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-report/pom.xml
+++ b/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-report/pom.xml
@@ -32,7 +32,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.8</version>
+                <version>0.8.9</version>
                 <executions>
                     <execution>
                         <id>report-aggregate</id>
diff --git a/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-ws/pom.xml b/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-ws/pom.xml
index ca2b697..f715a57 100644
--- a/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-ws/pom.xml
+++ b/ch-covidcertificate-backend-verification-check/ch-covidcertificate-backend-verification-check-ws/pom.xml
@@ -225,7 +225,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.8</version>
+                <version>0.8.9</version>
                 <executions>
                     <!-- to avoid bugs in some situations -->
                     <execution>
diff --git a/ch-covidcertificate-backend-verification-check/pom.xml b/ch-covidcertificate-backend-verification-check/pom.xml
index 043df76..9cf6969 100644
--- a/ch-covidcertificate-backend-verification-check/pom.xml
+++ b/ch-covidcertificate-backend-verification-check/pom.xml
@@ -18,13 +18,13 @@
 
     <properties>
         <java-version>11</java-version>
-        <kotlin.version>1.8.10</kotlin.version>
+        <kotlin.version>1.8.20</kotlin.version>
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <spring-boot-version>2.7.8</spring-boot-version>
-        <spring-cloud-sleuth-version>3.1.6</spring-cloud-sleuth-version>
+        <spring-boot-version>2.7.11</spring-boot-version>
+        <spring-cloud-sleuth-version>3.1.7</spring-cloud-sleuth-version>
         <jackson-version>2.11.1</jackson-version>
         <spring-cloud-connectors-version>2.2.13.RELEASE</spring-cloud-connectors-version>
 
@@ -197,7 +197,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.10.1</version>
+                    <version>3.11.0</version>
                 </plugin>
                 <plugin>
                     <groupId>org.springframework.boot</groupId>