diff --git a/node-api/src/main/kotlin/net/corda/nodeapi/internal/serialization/amqp/MapSerializer.kt b/node-api/src/main/kotlin/net/corda/nodeapi/internal/serialization/amqp/MapSerializer.kt
index c399243445..2853ba47ee 100644
--- a/node-api/src/main/kotlin/net/corda/nodeapi/internal/serialization/amqp/MapSerializer.kt
+++ b/node-api/src/main/kotlin/net/corda/nodeapi/internal/serialization/amqp/MapSerializer.kt
@@ -5,6 +5,7 @@ import java.io.NotSerializableException
 import java.lang.reflect.ParameterizedType
 import java.lang.reflect.Type
 import java.util.*
+import kotlin.collections.LinkedHashMap
 import kotlin.collections.Map
 import kotlin.collections.iterator
 import kotlin.collections.map
@@ -17,10 +18,16 @@ class MapSerializer(val declaredType: ParameterizedType, factory: SerializerFact
     override val typeDescriptor = "$DESCRIPTOR_DOMAIN:${fingerprintForType(type, factory)}"
 
     companion object {
-        private val supportedTypes: Map<Class<out Map<*, *>>, (Map<*, *>) -> Map<*, *>> = mapOf(
-                Map::class.java to { map -> Collections.unmodifiableMap(map) },
-                SortedMap::class.java to { map -> Collections.unmodifiableSortedMap(TreeMap(map)) },
-                NavigableMap::class.java to { map -> Collections.unmodifiableNavigableMap(TreeMap(map)) }
+        private val supportedTypes: Map<Class<out Any>, (Map<*, *>) -> Map<*, *>> = mapOf(
+                Map::class.java to { map -> map },
+                SortedMap::class.java to { map -> TreeMap(map) },
+                NavigableMap::class.java to { map -> TreeMap(map) },
+                Dictionary::class.java to { map -> Hashtable(map) },
+                // concrete types for user convienience
+                HashMap::class.java to { map -> LinkedHashMap(map) },
+                LinkedHashMap::class.java to { map -> LinkedHashMap(map) },
+                TreeMap::class.java to { map -> TreeMap(map) },
+                Hashtable::class.java to { map -> Hashtable(map) }
         )
 
         private fun findConcreteType(clazz: Class<*>): (Map<*, *>) -> Map<*, *> {
diff --git a/node-api/src/test/kotlin/net/corda/nodeapi/internal/serialization/amqp/DeserializeMapTests.kt b/node-api/src/test/kotlin/net/corda/nodeapi/internal/serialization/amqp/DeserializeMapTests.kt
new file mode 100644
index 0000000000..da16929ccb
--- /dev/null
+++ b/node-api/src/test/kotlin/net/corda/nodeapi/internal/serialization/amqp/DeserializeMapTests.kt
@@ -0,0 +1,93 @@
+package net.corda.nodeapi.internal.serialization.amqp
+
+import org.junit.Test
+import java.util.*
+import org.apache.qpid.proton.codec.Data
+
+class DeserializeCollectionTests {
+class TestSerializationOutput(
+            private val verbose: Boolean,
+            serializerFactory: SerializerFactory = SerializerFactory()) : SerializationOutput(serializerFactory) {
+
+        override fun writeSchema(schema: Schema, data: Data) {
+            if (verbose) println(schema)
+            super.writeSchema(schema, data)
+        }
+    }
+    companion object {
+        /**
+         * If you want to see the schema encoded into the envelope after serialisation change this to true
+         */
+        private const val VERBOSE = false
+    }
+
+    val sf = SerializerFactory()
+
+    @Test
+    fun mapTest() {
+        data class C(val c: Map<String, Int>)
+        val c = C (mapOf("A" to 1, "B" to 2))
+
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+    @Test
+    fun sortedMapTest() {
+        data class C(val c: SortedMap<String, Int>)
+        val c = C(sortedMapOf ("A" to 1, "B" to 2))
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+    @Test
+    fun dictionaryTest() {
+        data class C(val c: Dictionary<String, Int>)
+        var v : Hashtable<String, Int> = Hashtable()
+        v.put ("a", 1)
+        v.put ("b", 2)
+        val c = C(v)
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+    @Test
+    fun navigableMapTest() {
+        data class C(val c: NavigableMap<String, Int>)
+        val c = C(TreeMap (mapOf("A" to 1, "B" to 3)).descendingMap())
+
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+    @Test(expected=java.lang.IllegalArgumentException::class)
+    fun HashMapTest() {
+        data class C(val c : HashMap<String, Int>)
+        val c = C (HashMap (mapOf("A" to 1, "B" to 2)))
+
+        // expect this to throw
+        TestSerializationOutput(VERBOSE, sf).serialize(c)
+    }
+
+    @Test
+    fun concreteTreeMapTest() {
+        data class C(val c: TreeMap<String, Int>)
+        val c = C(TreeMap (mapOf("A" to 1, "B" to 3)))
+
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+    @Test
+    fun concreteLinkedHashMapTest() {
+        data class C(val c : LinkedHashMap<String, Int>)
+        val c = C (LinkedHashMap (mapOf("A" to 1, "B" to 2)))
+
+        val serialisedBytes = TestSerializationOutput(VERBOSE, sf).serialize(c)
+        val deserializedObj = DeserializationInput(sf).deserialize(serialisedBytes)
+    }
+
+
+
+
+}