diff --git a/build.gradle.kts b/build.gradle.kts
index 4d6e4fd1..b3b4849e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -44,7 +44,7 @@ subprojects {
     testImplementation("ch.qos.logback:logback-classic:1.3.14")
     testImplementation("org.hamcrest:hamcrest-all:1.3")
     testImplementation("org.mockito:mockito-core:4.11.0")
-    testImplementation("com.google.guava:guava:33.1.0-jre")
+    testImplementation("com.google.guava:guava:33.3.1-jre")
   }
 
   base {
diff --git a/fluency-treasuredata/build.gradle.kts b/fluency-treasuredata/build.gradle.kts
index bab7c7bb..f4e51c2c 100644
--- a/fluency-treasuredata/build.gradle.kts
+++ b/fluency-treasuredata/build.gradle.kts
@@ -2,7 +2,7 @@ dependencies {
   implementation(projects.fluencyCore)
 
   implementation("com.treasuredata.client:td-client:1.1.1")
-  implementation("com.google.guava:guava:33.1.0-jre")
+  implementation("com.google.guava:guava:33.3.1-jre")
   testImplementation("com.fasterxml.jackson.datatype:jackson-datatype-json-org:2.16.1")
   testImplementation("com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.16.1")
   implementation("com.squareup.okhttp3:okhttp:3.14.9")