diff --git a/parent/pom.xml b/parent/pom.xml
index 72cf72d..94fea95 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -284,11 +284,6 @@
                 <version>1.0.3</version>
             </dependency>
             <dependency>
-                <groupId>concurrent</groupId>
-                <artifactId>concurrent</artifactId>
-                <version>1.3.4</version>
-            </dependency>
-            <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
                 <version>4.8.2</version>