diff --git a/build.gradle b/build.gradle
index 9f0dc54..7e82db0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,7 +18,7 @@ dependencies {
 
     implementation "com.google.auto.value:auto-value-annotations:$autoValueVersion"
     annotationProcessor "com.google.auto.value:auto-value:$autoValueVersion"
-    implementation 'com.google.guava:guava:33.4.0-jre'
+    implementation 'com.google.guava:guava:33.5.0-jre'
     implementation "com.fasterxml.jackson.core:jackson-core:$jacksonVersion"
     implementation "com.fasterxml.jackson.core:jackson-databind:$jacksonVersion"
     implementation "com.fasterxml.jackson.datatype:jackson-datatype-jdk8:$jacksonVersion"
diff --git a/src/main/java/com/exercism/report/Report.java b/src/main/java/com/exercism/report/Report.java
index 7398fa3..9a8e5e1 100644
--- a/src/main/java/com/exercism/report/Report.java
+++ b/src/main/java/com/exercism/report/Report.java
@@ -4,9 +4,9 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.google.auto.value.AutoValue;
 import com.google.common.collect.ImmutableList;
-import java.util.List;
+import org.jspecify.annotations.Nullable;
 
-import javax.annotation.Nullable;
+import java.util.List;
 
 @AutoValue
 @JsonDeserialize(builder = AutoValue_Report.Builder.class)
diff --git a/src/main/java/com/exercism/report/TestDetails.java b/src/main/java/com/exercism/report/TestDetails.java
index 5b165a9..6ad1ede 100644
--- a/src/main/java/com/exercism/report/TestDetails.java
+++ b/src/main/java/com/exercism/report/TestDetails.java
@@ -1,10 +1,9 @@
 package com.exercism.report;
 
-import javax.annotation.Nullable;
-
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.google.auto.value.AutoValue;
+import org.jspecify.annotations.Nullable;
 
 import java.util.Optional;