diff --git a/dart-processor/src/main/java/com/f2prateek/dart/processor/ExtraInjectionGenerator.java b/dart-processor/src/main/java/com/f2prateek/dart/processor/ExtraInjectionGenerator.java
index 7ee9e6a2..e04c5ec2 100644
--- a/dart-processor/src/main/java/com/f2prateek/dart/processor/ExtraInjectionGenerator.java
+++ b/dart-processor/src/main/java/com/f2prateek/dart/processor/ExtraInjectionGenerator.java
@@ -27,6 +27,7 @@
 import com.squareup.javapoet.MethodSpec;
 import com.squareup.javapoet.TypeName;
 import com.squareup.javapoet.TypeSpec;
+import com.squareup.javapoet.AnnotationSpec;
 import java.util.Collection;
 import java.util.List;
 import javax.lang.model.element.Modifier;
@@ -64,6 +65,8 @@ public String getFqcn() {
 
   private void emitInject(TypeSpec.Builder builder) {
     MethodSpec.Builder injectBuilder = MethodSpec.methodBuilder("inject")
+        .addAnnotation(AnnotationSpec.builder(SuppressWarnings.class)
+                        .addMember("value", "$L", "{\"unchecked\",\"rawtypes\"}").build())
         .addModifiers(Modifier.PUBLIC, Modifier.STATIC)
         .addParameter(ClassName.get(Dart.Finder.class), "finder")
         .addParameter(ClassName.bestGuess(target.targetClass), "target")
diff --git a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraTest.java b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraTest.java
index d66bd669..f4f6263f 100644
--- a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraTest.java
+++ b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraTest.java
@@ -53,7 +53,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -96,7 +98,9 @@ public class InjectExtraTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key_bool\");", //
@@ -177,7 +181,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -218,7 +224,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -276,7 +284,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -314,7 +324,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -440,7 +452,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -459,7 +473,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestOne$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestOne target, Object source) {", //
             "    Test$$ExtraInjector.inject(finder, target, source);", //
             "    Object object;", //
@@ -502,7 +518,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class Test$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, Test target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -521,7 +539,9 @@ public class InjectExtraTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestOne$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestOne target, Object source) {",
             "    Test$$ExtraInjector.inject(finder, target, source);", //
             "    Object object;", //
diff --git a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithParcelerTest.java b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithParcelerTest.java
index bfb9d92a..4a3655d9 100644
--- a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithParcelerTest.java
+++ b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithParcelerTest.java
@@ -40,6 +40,7 @@ public class InjectExtraWithParcelerTest {
         "import java.lang.String;", //
         "import android.util.SparseArray;", //
         "public class TestSerializableCollection extends Activity {", //
+		"@SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
         "  @InjectExtra(\"key\") SparseArray<String> extra;", //
         "}" //
     ));
@@ -49,7 +50,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestSerializableCollection$$ExtraInjector {", //
+			"@SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestSerializableCollection target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -87,7 +90,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
         "import com.f2prateek.dart.Dart;", //
         "import java.lang.Object;", //
+		"import java.lang.SuppressWarnings;", //
         "public class TestNonSerializableNonParcelableCollection_withoutParceler$$ExtraInjector {", //
+		"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
         "  public static void inject(Dart.Finder finder, TestNonSerializableNonParcelableCollection_withoutParceler target, Object source) {", //
         "    Object object;", //
         "    object = finder.getExtra(source, \"key\");", //
@@ -126,7 +131,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestParcelAnnotated$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestParcelAnnotated target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -166,7 +173,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestCollectionParcel$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestCollectionParcel target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -212,7 +221,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestParcelExtendsParcelable$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestParcelExtendsParcelable target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -263,7 +274,9 @@ public class InjectExtraWithParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestParcelableExtendsParcelable$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestParcelableExtendsParcelable target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
diff --git a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithoutParcelerTest.java b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithoutParcelerTest.java
index 092f8de2..a64a6d5c 100644
--- a/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithoutParcelerTest.java
+++ b/dart-processor/src/test/java/com/f2prateek/dart/processor/InjectExtraWithoutParcelerTest.java
@@ -50,8 +50,10 @@ public class InjectExtraWithoutParcelerTest {
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
             "import java.lang.String;", //
+			"import java.lang.SuppressWarnings;", //
             "import java.util.ArrayList;", //
             "public class TestSerializableCollection$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestSerializableCollection target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //
@@ -169,7 +171,9 @@ public class InjectExtraWithoutParcelerTest {
             "package test;", //
             "import com.f2prateek.dart.Dart;", //
             "import java.lang.Object;", //
+			"import java.lang.SuppressWarnings;", //
             "public class TestParcelableExtendsParcelable$$ExtraInjector {", //
+			"  @SuppressWarnings({\"unchecked\",\"rawtypes\"})", //
             "  public static void inject(Dart.Finder finder, TestParcelableExtendsParcelable target, Object source) {", //
             "    Object object;", //
             "    object = finder.getExtra(source, \"key\");", //