diff --git a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpManager.java b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpManager.java
index f18b861..a0f9548 100644
--- a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpManager.java
+++ b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpManager.java
@@ -17,15 +17,6 @@
 
 import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableSet;
-
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Modified;
-import org.apache.felix.scr.annotations.Property;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
 import org.onlab.packet.ARP;
 import org.onlab.packet.DHCP;
 import org.onlab.packet.Ethernet;
@@ -69,6 +60,12 @@
 import org.onosproject.net.provider.AbstractProvider;
 import org.onosproject.net.provider.ProviderId;
 import org.osgi.service.component.ComponentContext;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Modified;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -77,7 +74,6 @@
 import java.util.Date;
 import java.util.Dictionary;
 import java.util.HashSet;
-
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -97,8 +93,7 @@
 /**
  * Skeletal ONOS DHCP Server application.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = DhcpService.class)
 public class DhcpManager implements DhcpService {
 
     private static final ProviderId PID = new ProviderId("of", "org.onosproject.dhcp", true);
@@ -119,28 +114,28 @@
                 }
             }
     );
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected NetworkConfigRegistry cfgService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected PacketService packetService;
 
     private DhcpPacketProcessor processor = new DhcpPacketProcessor();
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected CoreService coreService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected DhcpStore dhcpStore;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected HostProviderRegistry hostProviderRegistry;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ComponentConfigService componentConfigService;
 
-    @Property(name = ALLOW_HOST_DISCOVERY, boolValue = DEFAULT_ALLOW_HOST_DISCOVERY,
-            label = "Allow host discovery from DHCP request")
+    //@Property(name = ALLOW_HOST_DISCOVERY, boolValue = DEFAULT_ALLOW_HOST_DISCOVERY,
+    //        label = "Allow host discovery from DHCP request")
     private boolean allowHostDiscovery = DEFAULT_ALLOW_HOST_DISCOVERY;
 
     protected HostProviderService hostProviderService;
diff --git a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpUi.java b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpUi.java
index 0369dde..908099c 100644
--- a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpUi.java
+++ b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DhcpUi.java
@@ -16,16 +16,15 @@
 package org.onosproject.dhcp.impl;
 
 import com.google.common.collect.ImmutableList;
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
 import org.onosproject.ui.UiExtension;
 import org.onosproject.ui.UiExtensionService;
 import org.onosproject.ui.UiMessageHandlerFactory;
 import org.onosproject.ui.UiView;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -36,14 +35,13 @@
 /**
  * Mechanism to stream data to the GUI.
  */
-@Component(immediate = true, enabled = true)
-@Service(value = DhcpUi.class)
+@Component(immediate = true, service = DhcpUi.class)
 public class DhcpUi {
 
     private final Logger log = LoggerFactory.getLogger(getClass());
     private static final ClassLoader CL = DhcpUi.class.getClassLoader();
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected UiExtensionService uiExtensionService;
 
     private final UiMessageHandlerFactory messageHandlerFactory =
diff --git a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DistributedDhcpStore.java b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DistributedDhcpStore.java
index 94b0ddc..e8ce2cc 100644
--- a/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DistributedDhcpStore.java
+++ b/apps/dhcp/app/src/main/java/org/onosproject/dhcp/impl/DistributedDhcpStore.java
@@ -16,12 +16,6 @@
 package org.onosproject.dhcp.impl;
 
 import com.google.common.collect.ImmutableSet;
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
 import org.onlab.packet.Ip4Address;
 import org.onlab.packet.MacAddress;
 import org.onlab.util.KryoNamespace;
@@ -34,12 +28,17 @@
 import org.onosproject.store.service.Serializer;
 import org.onosproject.store.service.StorageService;
 import org.onosproject.store.service.Versioned;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.Date;
-import java.util.Map;
 import java.util.HashMap;
+import java.util.Map;
 
 import static org.onosproject.dhcp.IpAssignment.AssignmentStatus.Option_Assigned;
 import static org.onosproject.dhcp.IpAssignment.AssignmentStatus.Option_RangeNotEnforced;
@@ -49,13 +48,12 @@
  * Remembers the mapping between MAC ID and IP Addresses assigned.
  */
 
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = DhcpStore.class)
 public class DistributedDhcpStore implements DhcpStore {
 
     private final Logger log = LoggerFactory.getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected StorageService storageService;
 
     private ConsistentMap<HostId, IpAssignment> allocationMap;