diff --git a/Tophe-Ion/build.gradle b/Tophe-Ion/build.gradle
index 297884d..d986506 100644
--- a/Tophe-Ion/build.gradle
+++ b/Tophe-Ion/build.gradle
@@ -36,7 +36,7 @@ android {
 
 dependencies {
     def artifactSupportV4 = 'com.android.support:support-v4:21.0.3'
-    def artifactIon = 'com.koushikdutta.ion:ion:2.0.7'
+    def artifactIon = 'com.koushikdutta.ion:ion:2.1.6'
     def artifactTophe = 'co.tophe:tophe:1.0.1'
 
     def androidAsyncProject = ':AndroidAsync:AndroidAsync'
diff --git a/Tophe-Ion/src/main/java/co/tophe/ion/HttpEngineIon.java b/Tophe-Ion/src/main/java/co/tophe/ion/HttpEngineIon.java
index f7e0b2c..03b325e 100644
--- a/Tophe-Ion/src/main/java/co/tophe/ion/HttpEngineIon.java
+++ b/Tophe-Ion/src/main/java/co/tophe/ion/HttpEngineIon.java
@@ -1,12 +1,5 @@
 package co.tophe.ion;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Map.Entry;
-import java.util.concurrent.ExecutionException;
-
-import org.apache.http.protocol.HTTP;
-
 import android.content.Context;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
@@ -25,11 +18,21 @@
 import com.koushikdutta.async.parser.JSONObjectParser;
 import com.koushikdutta.async.parser.StringParser;
 import com.koushikdutta.async.stream.ByteBufferListInputStream;
-import com.koushikdutta.ion.*;
+import com.koushikdutta.ion.Ion;
+import com.koushikdutta.ion.ProgressCallback;
+import com.koushikdutta.ion.Response;
 import com.koushikdutta.ion.builder.Builders;
 import com.koushikdutta.ion.builder.LoadBuilder;
 import com.koushikdutta.ion.future.ResponseFuture;
 
+import org.apache.http.protocol.HTTP;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Type;
+import java.util.Map.Entry;
+import java.util.concurrent.ExecutionException;
+
 import co.tophe.AbstractHttpEngine;
 import co.tophe.HttpConfig;
 import co.tophe.HttpException;
@@ -240,6 +243,11 @@ protected void transform(ByteBufferList result) throws Exception {
 		public void write(DataSink sink, InputStream value, CompletedCallback completed) {
 			throw new AssertionError("not implemented");
 		}
+
+		@Override
+		public Type getType() {
+			return InputStream.class;
+		}
 	};
 	private static final AsyncParser<String> STRING_ASYNC_PARSER = new StringParser();
 	private static final AsyncParser<?> JSON_OBJECT_ASYNC_PARSER = new JSONObjectParser();
@@ -291,6 +299,11 @@ protected void transform(InputStream result) throws Exception {
 						@Override
 						public void write(DataSink sink, P value, CompletedCallback completed) {
 						}
+
+						@Override
+						public Type getType() {
+							return InputStream.class;
+						}
 					};
 				}
 			}
diff --git a/build.gradle b/build.gradle
index 674e7ce..a1c3b1c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:1.2.3'
     }
 }