add slfj-core dependency
diff --git a/pom.xml b/pom.xml
index 665d1b0..8248c68 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,6 +69,13 @@
 
             <dependency>
                 <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-core</artifactId>
+                <version>1.7.6</version>
+                <scope>test</scope>
+            </dependency>
+
+            <dependency>
+                <groupId>org.slf4j</groupId>
                 <artifactId>slf4j-jdk14</artifactId>
                 <version>1.7.6</version>
                 <scope>test</scope>