diff --git a/google-cloud-spanner/pom.xml b/google-cloud-spanner/pom.xml
index 22e2743a74..176078ebfb 100644
--- a/google-cloud-spanner/pom.xml
+++ b/google-cloud-spanner/pom.xml
@@ -410,7 +410,7 @@
     <dependency>
       <groupId>net.bytebuddy</groupId>
       <artifactId>byte-buddy-agent</artifactId>
-      <version>1.18.1</version>
+      <version>1.18.4</version>
       <scope>test</scope>
     </dependency>