diff --git a/pom.xml b/pom.xml
index 87f50fa..f05033e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -83,7 +83,7 @@
         <activation.version>1.1.1</activation.version>
         <commons-io.version>2.1</commons-io.version>
         <mockito-core.version>3.0.0</mockito-core.version>
-        <assertj.version>1.7.1</assertj.version>
+        <assertj.version>3.12.2</assertj.version>
         <guava.version>25.1-jre</guava.version>
         <mime4j.version>0.8.3</mime4j.version>
         <slf4j.version>1.7.27</slf4j.version>