diff --git a/sigstore-java/build.gradle.kts b/sigstore-java/build.gradle.kts
index 277ebff5..6df10de9 100644
--- a/sigstore-java/build.gradle.kts
+++ b/sigstore-java/build.gradle.kts
@@ -49,7 +49,7 @@ dependencies {
     testImplementation(platform("org.junit:junit-bom:5.10.1"))
     testImplementation("org.junit.jupiter:junit-jupiter")
 
-    testImplementation(platform("org.mockito:mockito-bom:5.8.0"))
+    testImplementation(platform("org.mockito:mockito-bom:5.9.0"))
     testImplementation("org.mockito:mockito-core")
     testImplementation("org.mockito:mockito-junit-jupiter")