diff --git a/Il2CppInspector/Metadata.cs b/Il2CppInspector/Metadata.cs
index 3911a90..f7f4b01 100644
--- a/Il2CppInspector/Metadata.cs
+++ b/Il2CppInspector/Metadata.cs
@@ -78,7 +78,8 @@ namespace Il2CppInspector
             }
             
             // Load all the relevant metadata using offsets provided in the header
-            Images = ReadArray<Il2CppImageDefinition>(Header.imagesOffset, Header.imagesCount / Sizeof(typeof(Il2CppImageDefinition)));
+            if (Version >= 16)
+                Images = ReadArray<Il2CppImageDefinition>(Header.imagesOffset, Header.imagesCount / Sizeof(typeof(Il2CppImageDefinition)));
 
             // As an additional sanity check, all images in the metadata should have Mono.Cecil.MetadataToken == 1
             // In metadata v24.1, two extra fields were added which will cause the below test to fail.
@@ -95,13 +96,11 @@ namespace Il2CppInspector
                         throw new InvalidOperationException("ERROR: Could not verify the integrity of the metadata file image list");
                 }
 
-            Assemblies = ReadArray<Il2CppAssemblyDefinition>(Header.assembliesOffset, Header.assembliesCount / Sizeof(typeof(Il2CppAssemblyDefinition)));
             Types = ReadArray<Il2CppTypeDefinition>(Header.typeDefinitionsOffset, Header.typeDefinitionsCount / Sizeof(typeof(Il2CppTypeDefinition)));
             Methods = ReadArray<Il2CppMethodDefinition>(Header.methodsOffset, Header.methodsCount / Sizeof(typeof(Il2CppMethodDefinition)));
             Params = ReadArray<Il2CppParameterDefinition>(Header.parametersOffset, Header.parametersCount / Sizeof(typeof(Il2CppParameterDefinition)));
             Fields = ReadArray<Il2CppFieldDefinition>(Header.fieldsOffset, Header.fieldsCount / Sizeof(typeof(Il2CppFieldDefinition)));
             FieldDefaultValues = ReadArray<Il2CppFieldDefaultValue>(Header.fieldDefaultValuesOffset, Header.fieldDefaultValuesCount / Sizeof(typeof(Il2CppFieldDefaultValue)));
-            ParameterDefaultValues = ReadArray<Il2CppParameterDefaultValue>(Header.parameterDefaultValuesOffset, Header.parameterDefaultValuesCount / Sizeof(typeof(Il2CppParameterDefaultValue)));
             Properties = ReadArray<Il2CppPropertyDefinition>(Header.propertiesOffset, Header.propertiesCount / Sizeof(typeof(Il2CppPropertyDefinition)));
             Events = ReadArray<Il2CppEventDefinition>(Header.eventsOffset, Header.eventsCount / Sizeof(typeof(Il2CppEventDefinition)));
             InterfaceUsageIndices = ReadArray<int>(Header.interfacesOffset, Header.interfacesCount / sizeof(int));
@@ -109,6 +108,10 @@ namespace Il2CppInspector
             GenericContainers = ReadArray<Il2CppGenericContainer>(Header.genericContainersOffset, Header.genericContainersCount / Sizeof(typeof(Il2CppGenericContainer)));
             GenericParameters = ReadArray<Il2CppGenericParameter>(Header.genericParametersOffset, Header.genericParametersCount / Sizeof(typeof(Il2CppGenericParameter)));
 
+            if (Version >= 16) {
+                Assemblies = ReadArray<Il2CppAssemblyDefinition>(Header.assembliesOffset, Header.assembliesCount / Sizeof(typeof(Il2CppAssemblyDefinition)));
+                ParameterDefaultValues = ReadArray<Il2CppParameterDefaultValue>(Header.parameterDefaultValuesOffset, Header.parameterDefaultValuesCount / Sizeof(typeof(Il2CppParameterDefaultValue)));
+            }
             if (Version >= 21) {
                 AttributeTypeIndices = ReadArray<int>(Header.attributeTypesOffset, Header.attributeTypesCount / sizeof(int));
                 AttributeTypeRanges = ReadArray<Il2CppCustomAttributeTypeRange>(Header.attributesInfoOffset, Header.attributesInfoCount / Sizeof(typeof(Il2CppCustomAttributeTypeRange)));
diff --git a/Il2CppInspector/MetadataClasses.cs b/Il2CppInspector/MetadataClasses.cs
index e5e44f2..c73c419 100644
--- a/Il2CppInspector/MetadataClasses.cs
+++ b/Il2CppInspector/MetadataClasses.cs
@@ -11,6 +11,8 @@ namespace Il2CppInspector
 {
     // Unity 4.6.1p5 - first release, no global-metadata.dat
     // Unity 5.2.0f3 -> v15
+    // Unity 5.3.0f1 -> v16
+    // ..
     // Unity 5.6.2p3 -> v23
     // Unity 5.6.4f1 -> v23
     // Unity 2017.2f3 -> v24
@@ -39,7 +41,9 @@ namespace Il2CppInspector
         public int methodsOffset; // Il2CppMethodDefinition
         public int methodsCount;
 
+        [Version(Min = 16)]
         public int parameterDefaultValuesOffset; // Il2CppParameterDefaultValue
+        [Version(Min = 16)]
         public int parameterDefaultValuesCount;
 
         public int fieldDefaultValuesOffset; // Il2CppFieldDefaultValue
@@ -47,7 +51,9 @@ namespace Il2CppInspector
         public int fieldAndParameterDefaultValueDataOffset; // uint8_t
         public int fieldAndParameterDefaultValueDataCount;
 
+        [Version(Min = 16)]
         public int fieldMarshaledSizesOffset; // Il2CppFieldMarshaledSize
+        [Version(Min = 16)]
         public int fieldMarshaledSizesCount;
 
         public int parametersOffset; // Il2CppParameterDefinition
@@ -76,9 +82,13 @@ namespace Il2CppInspector
         [Version(Max = 24.1)]
         public int rgctxEntriesCount;
 
+        [Version(Min = 16)]
         public int imagesOffset; // Il2CppImageDefinition
+        [Version(Min = 16)]
         public int imagesCount;
+        [Version(Min = 16)]
         public int assembliesOffset; // Il2CppAssemblyDefinition
+        [Version(Min = 16)]
         public int assembliesCount;
 
         [Version(Min = 19)]
@@ -159,7 +169,13 @@ namespace Il2CppInspector
     public class Il2CppAssemblyDefinition
     {
         public int imageIndex;
+
+        [Version(Min = 19)]
         public uint token;
+
+        [Version(Max = 24.0)]
+        public int customAttributeIndex;
+
         public int referencedAssemblyStart;
         public int referencedAssemblyCount;
         public Il2CppAssemblyNameDefinition aname;
@@ -253,7 +269,10 @@ namespace Il2CppInspector
     public class Il2CppMethodDefinition
     {
         public int nameIndex;
+
+        [Version(Min = 16)]
         public int declaringType;
+
         public int returnType;
         public int parameterStart;