diff --git a/src/main/java/org/archive/resource/MetaData.java b/src/main/java/org/archive/resource/MetaData.java
index 91ef0439..05c0ee06 100755
--- a/src/main/java/org/archive/resource/MetaData.java
+++ b/src/main/java/org/archive/resource/MetaData.java
@@ -157,19 +157,7 @@ public JSONObject put(String name, long value) throws JSONException {
 
 	@Override
 	public JSONObject put(String key, Object value) {
-		if (value instanceof JSONArray) {
-			super.remove(key);
-			super.put(key, value);
-		} else if (has(key)) {
-			if (super.get(key) instanceof JSONArray) {
-				((JSONArray) super.get(key)).put(value);
-				return this;
-			} else {
-				JSONArray array = new JSONArray();
-				array.put(super.get(key));
-				array.put(value);
-				super.put(key, array);
-			}
+		if (has(key)) {
 			return super.accumulate(key, value);
 		}
 		return super.put(key, value);
diff --git a/src/test/java/org/archive/resource/MetaDataTest.java b/src/test/java/org/archive/resource/MetaDataTest.java
index ea66135a..64ef7b5b 100644
--- a/src/test/java/org/archive/resource/MetaDataTest.java
+++ b/src/test/java/org/archive/resource/MetaDataTest.java
@@ -7,8 +7,9 @@
 import org.archive.extract.ProducerUtils;
 import org.archive.extract.ResourceFactoryMapper;
 import org.archive.format.json.JSONUtils;
-import org.json.JSONArray;
-import org.json.JSONObject;
+
+import com.github.openjson.JSONArray;
+import com.github.openjson.JSONObject;
 
 import junit.framework.TestCase;
 
@@ -73,8 +74,7 @@ private void verifyMultiValuedMetaData(MetaData m) {
 		assertEquals(1.5d, ((JSONArray) m.get("double-1")).getDouble(1));
 		assertEquals(2.5d, m.getDouble("double-2"));
 		assertEquals(3.5d, m.getDouble("double-3"));
-		// could be Double or BigDecimal, depending on the Java version
-		// assertEquals(Double.class, m.get("double-3").getClass());
+		assertEquals(Double.class, m.get("double-3").getClass());
 		assertEquals(3.5d, m.optDouble("double-3"));
 		assertEquals(99.5d, m.optDouble("double-99", 99.5d));