diff --git a/pom.xml b/pom.xml
index 168c11e..f24c8c8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -59,12 +59,12 @@
         <dependency>
             <groupId>com.sun.jersey</groupId>
             <artifactId>jersey-client</artifactId>
-            <version>1.5</version>
+            <version>1.12</version>
         </dependency>
         <dependency>
             <groupId>com.sun.jersey</groupId>
             <artifactId>jersey-json</artifactId>
-            <version>1.5</version>
+            <version>1.12</version>
         </dependency>
         <dependency>
             <groupId>javax.ws.rs</groupId>
@@ -103,8 +103,8 @@
         </dependency>
         <dependency>
             <groupId>com.sun.jersey</groupId>
-            <artifactId>jersey-server</artifactId>
-            <version>1.5</version>
+            <artifactId>jersey-grizzly</artifactId>
+            <version>1.12</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcHttpClient.java b/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcHttpClient.java
index 48d6a8d..73e25c6 100644
--- a/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcHttpClient.java
+++ b/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcHttpClient.java
@@ -144,7 +144,7 @@ public void destroy(){
     }
 
     @Override
-    protected void finalize(){
+    protected void finalize() throws Throwable{
         try {
             // Do not close the AHCClient.
             super.destroy();
diff --git a/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcRequestWriter.java b/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcRequestWriter.java
index 9684d54..8a9e9eb 100644
--- a/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcRequestWriter.java
+++ b/src/main/java/org/sonatype/spice/jersey/client/ahc/AhcRequestWriter.java
@@ -78,7 +78,7 @@ private void configureHeaders(MultivaluedMap<String, Object> metadata, RequestBu
                 if (String.class.isAssignableFrom( o.getClass() )) {
                     requestBuilder.addHeader(e.getKey(), o.toString());
                 } else {
-                    requestBuilder.addHeader(e.getKey(), headerValueToString(o));
+                    requestBuilder.addHeader(e.getKey(), ClientRequest.getHeaderValue(o));
                 }
             }
         }