diff --git a/backend/pom.xml b/backend/pom.xml
index 7f95adf4..4c7f82fb 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -7,7 +7,7 @@
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.2.1.RELEASE</version>
-		<relativePath /> <!-- lookup parent from repository -->
+		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>de.itermori.pse.kitroomfinder</groupId>
 	<artifactId>backend</artifactId>
@@ -29,7 +29,7 @@
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava</artifactId>
-			<version>31.0.1-jre</version>
+			<version>31.1-jre</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>