diff --git a/build.gradle.kts b/build.gradle.kts
index 43e3ca5..787ea0f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -30,7 +30,7 @@ dependencies {
     api("com.pdftron:PDFNet:11.0.0")
     testImplementation("net.sourceforge.lept4j:lept4j:1.19.1")
     testImplementation("org.junit.jupiter:junit-jupiter:5.10.2")
-    testImplementation("org.assertj:assertj-core:3.24.2")
+    testImplementation("org.assertj:assertj-core:3.27.3")
     testImplementation("org.mockito:mockito-core:5.2.0")
     testImplementation("org.apache.logging.log4j:log4j-slf4j2-impl:2.22.1")
     compileOnly("org.slf4j:slf4j-api:2.0.11")