diff --git a/.github/workflows/unit-tests.yaml b/.github/workflows/unit-tests.yaml
index fa55928..837d2d3 100644
--- a/.github/workflows/unit-tests.yaml
+++ b/.github/workflows/unit-tests.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11, 17]
+        java: [8, 11, 17, 21]
     env:
       CLOUDSDK_CORE_DISABLE_USAGE_REPORTING: true
       CLOUDSDK_CORE_DISABLE_PROMPTS: true
diff --git a/pom.xml b/pom.xml
index 32c3220..39e7af7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -268,7 +268,7 @@
       <plugin>
         <groupId>com.github.spotbugs</groupId>
         <artifactId>spotbugs-maven-plugin</artifactId>
-        <version>4.2.3</version>
+        <version>4.7.3.5</version>
         <configuration>
           <excludeFilterFile>spotbugs-exclude.xml</excludeFilterFile>
         </configuration>
diff --git a/spotbugs-exclude.xml b/spotbugs-exclude.xml
index 497d61d..8f17610 100644
--- a/spotbugs-exclude.xml
+++ b/spotbugs-exclude.xml
@@ -3,6 +3,8 @@
   <Match>
     <Or>
       <Bug pattern="DM_STRING_CTOR"/>
+      <Bug pattern="EI_EXPOSE_REP"/>
+      <Bug pattern="EI_EXPOSE_REP2"/>
     </Or>
   </Match>
 </FindBugsFilter>