diff --git a/build.gradle b/build.gradle
index 0c9eefef..8f7790f7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ ext {
   netty4Version = '4.1.110.Final'
   commonsTextVersion = '1.12.0'
   slf4jVersion = '2.0.13'
-  assertjVersion = '3.25.3'
+  assertjVersion = '3.26.0'
   mockitoVersion = '5.12.0'
   pdfTestVersion = '1.8.1'
   groovyVersion = '3.0.21'