diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 70864e860..fb821355f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -142,7 +142,7 @@ jobs:
     name: 'Linux (JDK 11), Newest Guava'
     runs-on: ubuntu-latest
     env:
-      GUAVA: 32.1.1-jre # newest supported Guava version
+      GUAVA: 33.4.0-jre # newest supported Guava version
     steps:
       - name: 'Set up JDK 11'
         uses: actions/setup-java@v4