diff --git a/mockito.spec b/mockito.spec
index a7b295c..47693b9 100644
--- a/mockito.spec
+++ b/mockito.spec
@@ -22,6 +22,7 @@ BuildRequires:  mvn(junit:junit)
 BuildRequires:  mvn(net.bytebuddy:byte-buddy)
 BuildRequires:  mvn(net.bytebuddy:byte-buddy-agent)
 BuildRequires:  mvn(org.apache.felix:maven-bundle-plugin)
+BuildRequires:  mvn(org.assertj:assertj-core)
 BuildRequires:  mvn(org.codehaus.mojo:exec-maven-plugin)
 BuildRequires:  mvn(org.hamcrest:hamcrest-core)
 BuildRequires:  mvn(org.objenesis:objenesis)