Add a direct dependency on the osgi core classes
diff --git a/pom.xml b/pom.xml
index 5d5eff3..6e87260 100644
--- a/pom.xml
+++ b/pom.xml
@@ -46,6 +46,12 @@
     <dependencies>
         <dependency>
             <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.core</artifactId>
+            <version>6.0.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.osgi</groupId>
             <artifactId>org.osgi.annotation.versioning</artifactId>
             <scope>provided</scope>
         </dependency>