diff --git a/easy-rules-core/pom.xml b/easy-rules-core/pom.xml
index cbc001d..94a7ee4 100644
--- a/easy-rules-core/pom.xml
+++ b/easy-rules-core/pom.xml
@@ -54,6 +54,12 @@
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>${slf4j-api.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>