diff --git a/CMakeLists.txt b/CMakeLists.txt
index 731aa19..5e9704a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.21)
 
-project(mat-json VERSION 3.0.2)
+project(mat-json VERSION 3.0.3)
 
 set(SOURCE_FILES
     src/external/dragonbox.cpp
diff --git a/README.md b/README.md
index 11d1ac4..f8158e6 100644
--- a/README.md
+++ b/README.md
@@ -282,6 +282,17 @@ int main() {
 
 There is built in support for serializing std containers by including an optional header:
 
+Supported classes (given T is serializable):
+* `std::vector<T>`
+* `std::span<T>`
+* `std::map<std::string, T>`
+* `std::unordered_map<std::string, T>`
+* `std::set<T>`
+* `std::unordered_set<T>`
+* `std::optional<T>` - `null` is prioritized as `std::nullopt`
+* `std::shared_ptr<T>` - same as above
+* `std::unique_ptr<T>` - same as above
+
 ```cpp
 #include <matjson/std.hpp>