diff --git a/pom.xml b/pom.xml
index 802d0fb5..71eb0eca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,7 +53,7 @@
         <jdk.version>17</jdk.version>
 
         <netex-java-model.version>2.0.15.2</netex-java-model.version>
-        <guava.version>32.1.3-jre</guava.version>
+        <guava.version>33.7.2-jre</guava.version>
 
         <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>
         <maven-exec-plugin.version>1.6.0</maven-exec-plugin.version>
diff --git a/src/test/java/org/entur/netex/loader/parser/ServiceCalendarFrameParserTest.java b/src/test/java/org/entur/netex/loader/parser/ServiceCalendarFrameParserTest.java
index 435eb7ef..a106d9b5 100644
--- a/src/test/java/org/entur/netex/loader/parser/ServiceCalendarFrameParserTest.java
+++ b/src/test/java/org/entur/netex/loader/parser/ServiceCalendarFrameParserTest.java
@@ -5,7 +5,6 @@
 import jakarta.xml.bind.JAXBElement;
 import java.time.LocalDateTime;
 import java.util.List;
-import javax.annotation.Nonnull;
 import javax.xml.namespace.QName;
 import org.entur.netex.index.impl.NetexEntitiesIndexImpl;
 import org.junit.jupiter.api.BeforeEach;
@@ -95,7 +94,7 @@ private OperatingPeriod mockOperatingPeriodWithRef(String id, String ref) {
       );
   }
 
-  public static <T> JAXBElement<T> createJaxbElement(@Nonnull T value) {
+  public static <T> JAXBElement<T> createJaxbElement(T value) {
     return new JAXBElement(new QName("x"), value.getClass(), value);
   }