diff --git a/src/main/java/com/esaulpaugh/headlong/abi/ABIType.java b/src/main/java/com/esaulpaugh/headlong/abi/ABIType.java
index bd6ab22f..e40d5edc 100644
--- a/src/main/java/com/esaulpaugh/headlong/abi/ABIType.java
+++ b/src/main/java/com/esaulpaugh/headlong/abi/ABIType.java
@@ -109,8 +109,8 @@ public int getFlags() {
         return FLAGS_UNSET;
     }
 
-    public final ArrayType<?, ?, J> asArrayType() {
-        return (ArrayType<?, ?, J>) this;
+    public final <E, ET extends ABIType<E>> ArrayType<ET, E, J> asArrayType() {
+        return (ArrayType<ET, E, J>) this;
     }
 
     public final TupleType<? extends Tuple> asTupleType() {
diff --git a/src/main/java/com/esaulpaugh/headlong/abi/PackedDecoder.java b/src/main/java/com/esaulpaugh/headlong/abi/PackedDecoder.java
index 180f3f41..694c05ca 100644
--- a/src/main/java/com/esaulpaugh/headlong/abi/PackedDecoder.java
+++ b/src/main/java/com/esaulpaugh/headlong/abi/PackedDecoder.java
@@ -74,7 +74,7 @@ private static Tuple decodeTuple(TupleType<?> tupleType, ByteBuffer bb, int end)
                 break;
             }
             if (type instanceof ArrayType) {
-                final ArrayType<?, ?, ?> arrayType = type.asArrayType();
+                final ArrayType<ABIType<Object>, ?, ?> arrayType = type.asArrayType();
                 final int elementByteLength = arrayType.getElementType() instanceof UnitType
                         ? UNIT_LENGTH_BYTES
                         : arrayType.getElementType().byteLengthPacked(null);
@@ -159,9 +159,8 @@ private static BigInteger getSignedBigInt(ByteBuffer bb, int elementLen) {
         return new BigInteger(temp);
     }
 
-    @SuppressWarnings("unchecked")
-    private static Object decodeArray(ArrayType<?, ?, ?> arrayType, ByteBuffer bb, int end) {
-        final ABIType<Object> elementType = (ABIType<Object>) arrayType.getElementType();
+    private static Object decodeArray(ArrayType<ABIType<Object>, ?, ?> arrayType, ByteBuffer bb, int end) {
+        final ABIType<Object> elementType = arrayType.getElementType();
         final int elementByteLen = elementType instanceof UnitType ? UNIT_LENGTH_BYTES : elementType.byteLengthPacked(null);
         final int typeLen = arrayType.getLength();
         final int arrayLen;