diff --git a/mod.json b/mod.json
index 0c405ee..89f7f89 100644
--- a/mod.json
+++ b/mod.json
@@ -1,10 +1,10 @@
 {
-	"geode": "3.8.1",
+	"geode": "4.0.0",
 	"version": "v1.6.2",
 	"gd": {
-		"win": "2.206",
-		"android": "2.206",
-		"mac": "2.206"
+		"win": "2.2073",
+		"android": "2.2073",
+		"mac": "2.2073"
 	},
 	"id": "geode.texture-loader",
 	"name": "Texture Loader",
diff --git a/src/Pack.cpp b/src/Pack.cpp
index fecf01e..119e3b3 100644
--- a/src/Pack.cpp
+++ b/src/Pack.cpp
@@ -8,14 +8,12 @@ Result<PackInfo> PackInfo::from(matjson::Value const& json) {
     auto info = PackInfo();
 
     auto copyJson = json;
-    auto checker = JsonChecker(copyJson);
-    auto root = checker.root("[pack.json]").obj();
+    auto root = checkJson(copyJson, "[pack.json]");
 
     auto target = root.needs("textureldr").get<VersionInfo>();
 
-    if (checker.isError()) {
-        return Err(checker.getError());
-    }
+    GEODE_UNWRAP(root.ok());
+
     auto current = Mod::get()->getVersion();
     if (target > VersionInfo(current.getMajor(), current.getMinor(), 99999999)) {
         return Err("Pack targets newer version of TextureLdr");
@@ -26,7 +24,7 @@ Result<PackInfo> PackInfo::from(matjson::Value const& json) {
     root.needs("version").into(info.m_version);
 
     // has single "author" key?
-    if (auto author = root.has("author").as<matjson::Type::String>()) {
+    if (auto& author = root.has("author").assertIsString()) {
         info.m_authors = { author.get<std::string>() };
     }
     // otherwise use "authors" key
@@ -34,9 +32,7 @@ Result<PackInfo> PackInfo::from(matjson::Value const& json) {
         root.needs("authors").into(info.m_authors);
     }
 
-    if (checker.isError()) {
-        return Err(checker.getError());
-    }
+    GEODE_UNWRAP(root.ok());
 
     return Ok(info);
 }
@@ -76,15 +72,8 @@ Result<> Pack::unapply() const {
 
 Result<> Pack::parsePackJson() {
     try {
-        auto data = file::readString(m_resourcesPath / "pack.json");
-        if (!data) {
-            return Err(data.error());
-        }
-        auto res = PackInfo::from(matjson::Value::from_str(data.value()));
-        if (!res) {
-            return Err(res.unwrapErr());
-        }
-        m_info = res.unwrap();
+        GEODE_UNWRAP_INTO(auto json, file::readJson(m_resourcesPath / "pack.json"));
+        GEODE_UNWRAP_INTO(m_info, PackInfo::from(json));
         return Ok();
     } catch(std::exception& e) {
         return Err("Unable to parse pack.json: {}", e.what());
@@ -241,12 +230,12 @@ Result<std::shared_ptr<Pack>> Pack::from(std::filesystem::path const& dir) {
     return Ok(pack);
 }
 
-matjson::Value matjson::Serialize<std::shared_ptr<Pack>>::to_json(std::shared_ptr<Pack> const& pack) {
-    return matjson::Object({
+matjson::Value matjson::Serialize<std::shared_ptr<Pack>>::toJson(std::shared_ptr<Pack> const& pack) {
+    return matjson::makeObject({
         { "path", pack->getOriginPath() }
     });
 }
 
-std::shared_ptr<Pack> matjson::Serialize<std::shared_ptr<Pack>>::from_json(matjson::Value const& value) {
-    return Pack::from(value["path"].as<std::filesystem::path>()).unwrap();
+Result<std::shared_ptr<Pack>> matjson::Serialize<std::shared_ptr<Pack>>::fromJson(matjson::Value const& value) {
+    return Ok(Pack::from(value["path"].as<std::filesystem::path>().unwrap()).unwrap());
 }
diff --git a/src/Pack.hpp b/src/Pack.hpp
index c33c4a3..21f2675 100644
--- a/src/Pack.hpp
+++ b/src/Pack.hpp
@@ -3,7 +3,7 @@
 #include <string>
 #include <optional>
 #include <memory>
-#include <Geode/utils/Result.hpp>
+#include <Geode/Result.hpp>
 #include <Geode/utils/VersionInfo.hpp>
 #include <Geode/ui/EnterLayerEvent.hpp>
 #include <matjson/stl_serialize.hpp>
@@ -52,9 +52,6 @@ class Pack {
 
 template <>
 struct matjson::Serialize<std::shared_ptr<Pack>> {
-    static matjson::Value to_json(std::shared_ptr<Pack> const& pack);
-    static std::shared_ptr<Pack> from_json(matjson::Value const& value);
-    static bool is_json(matjson::Value const& value) {
-        return value.is_object();
-    }
+    static matjson::Value toJson(std::shared_ptr<Pack> const& pack);
+    static Result<std::shared_ptr<Pack>> fromJson(matjson::Value const& value);
 };
diff --git a/src/PackInfoPopup.cpp b/src/PackInfoPopup.cpp
index 9eebce8..b779e84 100644
--- a/src/PackInfoPopup.cpp
+++ b/src/PackInfoPopup.cpp
@@ -147,7 +147,7 @@ bool PackInfoPopup::setup(std::shared_ptr<Pack> pack) {
 PackInfoPopup* PackInfoPopup::create(const std::shared_ptr<Pack>& pack) {
     auto ret = new PackInfoPopup;
     ret->m_pack = pack;
-    if (ret->init(
+    if (ret->initAnchored(
         320.f, 200.f, pack,
         ret->getPathInPack("GJ_square01.png").string().c_str()
     )) {
diff --git a/src/PackManager.cpp b/src/PackManager.cpp
index 092a9f4..332f1bd 100644
--- a/src/PackManager.cpp
+++ b/src/PackManager.cpp
@@ -39,7 +39,7 @@ void PackManager::movePackToIdx(const std::shared_ptr<Pack>& pack, PackListType
 }
 
 void PackManager::savePacks() {
-    Mod::get()->getSaveContainer()["applied"] = m_applied;
+    Mod::get()->setSavedValue("applied", m_applied);
 }
 
 std::filesystem::path PackManager::getPackDir() {
@@ -75,11 +75,13 @@ size_t PackManager::loadPacks() {
     
     std::vector<std::shared_ptr<Pack>> savedApplied;
     // manually do this so we can skip packs that fail
-    for (auto const& obj : Mod::get()->getSavedValue<matjson::Array>("applied")) {
-        if (obj.is_object() && obj.contains("path") && obj["path"].is_string()) {
-            auto res = Pack::from(obj["path"].as<std::filesystem::path>());
-            if (res) {
-                savedApplied.push_back(res.unwrap());
+    for (auto const& obj : Mod::get()->getSavedValue<std::vector<matjson::Value>>("applied")) {
+        if (obj.isObject() && obj.contains("path") && obj["path"].isString()) {
+            if(auto pathRes = obj["path"].as<std::filesystem::path>()) {
+                auto res = Pack::from(pathRes.unwrap());
+                if (res) {
+                    savedApplied.push_back(res.unwrap());
+                }
             }
         }
     }