diff --git a/build.gradle.kts b/build.gradle.kts
index a35df9a..0290ccc 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -50,7 +50,7 @@ dependencies {
     testImplementation("junit:junit:4.13.2")
     testImplementation("commons-io:commons-io:2.19.0")
     testImplementation("commons-codec:commons-codec:1.18.0")
-    testImplementation("org.testcontainers:testcontainers:1.20.6")
+    testImplementation("org.testcontainers:testcontainers:1.21.0")
     testImplementation("org.jetbrains:annotations:26.0.2")
     testImplementation("ch.qos.logback:logback-classic:1.5.18")
     testImplementation("org.hamcrest:hamcrest:3.0")