diff --git a/pom.xml b/pom.xml
index 2b0dc09..cedfc49 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,6 @@
     <artifactId>game</artifactId>
     <version>1.0-SNAPSHOT</version>
 
-
     <build>
         <plugins>
             <plugin>
@@ -89,14 +88,9 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.18.38</version>
+            <version>1.18.42</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>5.8.2</version>
-        </dependency>
 
         <dependency>
             <groupId>org.reflections</groupId>
@@ -107,25 +101,31 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>31.1-jre</version>
+            <version>33.5.0-jre</version>
         </dependency>
 
         <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
+            <groupId>tools.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.18.2</version>
+            <version>3.0.4</version>
         </dependency>
 
         <dependency>
-            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <groupId>tools.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-yaml</artifactId>
-            <version>2.18.2</version>
+            <version>3.0.4</version>
         </dependency>
 
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.13.2</version>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>6.0.2</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>6.0.2</version>
             <scope>test</scope>
         </dependency>
 
@@ -134,21 +134,18 @@
             <artifactId>slf4j-api</artifactId>
             <version>2.0.17</version>
         </dependency>
+
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.5.18</version>
+            <version>1.5.25</version>
         </dependency>
+
         <dependency>
             <groupId>com.github.trilarion</groupId>
             <artifactId>java-vorbis-support</artifactId>
             <version>1.2.1</version>
         </dependency>
-        <dependency>
-            <groupId>com.esotericsoftware</groupId>
-            <artifactId>kryo</artifactId>
-            <version>5.6.2</version>
-        </dependency>
 
         <dependency>
             <groupId>com.googlecode.lanterna</groupId>
@@ -159,13 +156,13 @@
         <dependency>
             <groupId>org.bytedeco</groupId>
             <artifactId>javacv-platform</artifactId>
-            <version>1.5.10</version>
+            <version>1.5.12</version>
         </dependency>
 
         <dependency>
             <groupId>org.bytedeco</groupId>
             <artifactId>ffmpeg-platform</artifactId>
-            <version>6.1.1-1.5.10</version>
+            <version>7.1.1-1.5.12</version>
         </dependency>
 
         <dependency>
@@ -173,6 +170,7 @@
             <artifactId>core</artifactId>
             <version>2.5</version>
         </dependency>
+
         <dependency>
             <groupId>be.tarsos.dsp</groupId>
             <artifactId>jvm</artifactId>
diff --git a/src/main/java/cz/jzitnik/Game.java b/src/main/java/cz/jzitnik/Game.java
index 55f2c52..1e26c6d 100644
--- a/src/main/java/cz/jzitnik/Game.java
+++ b/src/main/java/cz/jzitnik/Game.java
@@ -8,6 +8,8 @@ import cz.jzitnik.utils.ScheduledTaskManager;
 import cz.jzitnik.utils.ThreadManager;
 import org.reflections.Reflections;
 
+import java.io.IOException;
+
 public class Game {
     private final DependencyManager dependencyManager = new DependencyManager(new Reflections("cz.jzitnik"));
 
@@ -22,14 +24,10 @@ public class Game {
     @InjectDependency
     private GlobalIOHandlerRepository globalIOHandlerRepository;
 
-    public void start() {
+    public void start() throws IOException {
         dependencyManager.inject(this);
 
-        try {
-            gameSetup.setup();
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
+        gameSetup.setup();
         threadManager.startAll();
         scheduledTaskManager.startAll();
         globalIOHandlerRepository.setup();
diff --git a/src/main/java/cz/jzitnik/Main.java b/src/main/java/cz/jzitnik/Main.java
index b320606..a649b6d 100644
--- a/src/main/java/cz/jzitnik/Main.java
+++ b/src/main/java/cz/jzitnik/Main.java
@@ -2,8 +2,10 @@ package cz.jzitnik;
 
 // events/handlers/MouseMoveEventHandler.java
 
+import java.io.IOException;
+
 public class Main {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws IOException {
         new Game().start();
     }
 }
\ No newline at end of file
diff --git a/src/main/java/cz/jzitnik/game/setup/GameSetup.java b/src/main/java/cz/jzitnik/game/setup/GameSetup.java
index e7f7ed1..b6cff1a 100644
--- a/src/main/java/cz/jzitnik/game/setup/GameSetup.java
+++ b/src/main/java/cz/jzitnik/game/setup/GameSetup.java
@@ -1,7 +1,5 @@
 package cz.jzitnik.game.setup;
 
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import cz.jzitnik.annotations.Dependency;
 import cz.jzitnik.annotations.injectors.InjectDependency;
 import cz.jzitnik.annotations.injectors.InjectState;
@@ -9,7 +7,11 @@ import cz.jzitnik.game.GameRoom;
 import cz.jzitnik.game.GameState;
 import cz.jzitnik.game.Player;
 import cz.jzitnik.game.ResourceManager;
+import cz.jzitnik.utils.DependencyManager;
 import lombok.extern.slf4j.Slf4j;
+import tools.jackson.core.type.TypeReference;
+import tools.jackson.databind.ObjectMapper;
+import tools.jackson.databind.ObjectReader;
 
 import java.io.IOException;
 import java.util.List;
@@ -26,15 +28,22 @@ public class GameSetup {
     @InjectDependency
     private ObjectMapper objectMapper;
 
+    @InjectDependency
+    private DependencyManager dependencyManager;
+
     public void setup() throws IOException {
         //gameState.setScreen(new IntroScene(dependencyManager));
 
-        List<GameRoom> rooms = objectMapper.readValue(
-                resourceManager.getResourceAsStream("setup/rooms.yaml"),
-                new TypeReference<>() {
+        ObjectReader roomsReader = objectMapper.readerFor(
+                new TypeReference<List<GameRoom>>() {
                 }
+        ).with(dependencyManager);
+        List<GameRoom> rooms = roomsReader.readValue(
+                resourceManager.getResourceAsStream("setup/rooms.yaml")
         );
-        Player player = objectMapper.readValue(resourceManager.getResourceAsStream("setup/player.yaml"), Player.class);
+
+        ObjectReader playerReader = objectMapper.readerFor(Player.class).with(dependencyManager);
+        Player player = playerReader.readValue(resourceManager.getResourceAsStream("setup/player.yaml"));
 
         gameState.setCurrentRoom(rooms.getFirst());
         gameState.setPlayer(player);
diff --git a/src/main/java/cz/jzitnik/utils/DependencyManager.java b/src/main/java/cz/jzitnik/utils/DependencyManager.java
index b75875e..df403be 100644
--- a/src/main/java/cz/jzitnik/utils/DependencyManager.java
+++ b/src/main/java/cz/jzitnik/utils/DependencyManager.java
@@ -3,8 +3,6 @@ package cz.jzitnik.utils;
 // Don't blame me that I'm using field injection instead of construction injection. I just like it more, leave me alone.
 // Yes, I know I'll suffer in the unit tests. (who said there will be any? hmmm)
 
-import com.fasterxml.jackson.databind.*;
-import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import com.google.common.collect.ClassToInstanceMap;
 import com.google.common.collect.MutableClassToInstanceMap;
 import cz.jzitnik.annotations.Config;
@@ -15,8 +13,10 @@ import cz.jzitnik.annotations.injectors.InjectDependency;
 import cz.jzitnik.annotations.injectors.InjectState;
 import lombok.extern.slf4j.Slf4j;
 import org.reflections.Reflections;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.*;
+import tools.jackson.dataformat.yaml.YAMLFactory;
 
-import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
@@ -31,22 +31,17 @@ public class DependencyManager extends InjectableValues {
 
     public DependencyManager(Reflections reflections) {
         ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
-        mapper.setInjectableValues(this);
         data.put(ObjectMapper.class, mapper);
         data.put(ClassLoader.class, DependencyManager.class.getClassLoader());
 
         Set<Class<?>> configClasses = reflections.getTypesAnnotatedWith(Config.class);
         for (Class<?> configClass : configClasses) {
-            try {
-                Config config = configClass.getAnnotation(Config.class);
-                assert config != null;
-                Path filePath = Path.of("config", config.value());
-                InputStream stream = DependencyManager.class.getClassLoader().getResourceAsStream(filePath.toString());
-                Object instance = mapper.readValue(stream, configClass);
-                configs.put(configClass, instance);
-            } catch (IOException e) {
-                log.error("Failed to instantiate config class: {}", configClass.getName(), e);
-            }
+            Config config = configClass.getAnnotation(Config.class);
+            assert config != null;
+            Path filePath = Path.of("config", config.value());
+            InputStream stream = DependencyManager.class.getClassLoader().getResourceAsStream(filePath.toString());
+            Object instance = mapper.readValue(stream, configClass);
+            configs.put(configClass, instance);
         }
 
         Set<Class<?>> classes = reflections.getTypesAnnotatedWith(Dependency.class);
@@ -197,10 +192,7 @@ public class DependencyManager extends InjectableValues {
     }
 
     @Override
-    public Object findInjectableValue(Object valueId,
-                                      DeserializationContext ctxt,
-                                      BeanProperty forProperty,
-                                      Object beanInstance) throws JsonMappingException {
+    public Object findInjectableValue(DeserializationContext ctxt, Object valueId, BeanProperty forProperty, Object beanInstance, Boolean optional, Boolean useInput) throws JacksonException {
         if (valueId instanceof Class<?> clazz) {
             Object dep = data.getInstance(clazz);
             if (dep != null) return dep;
@@ -210,6 +202,9 @@ public class DependencyManager extends InjectableValues {
 
             if (clazz == this.getClass()) return this;
 
+            if (optional) {
+                return null;
+            }
             ctxt.reportInputMismatch(forProperty,
                     "No injectable value found for type: %s", clazz.getName());
         } else if (valueId instanceof String key) {
@@ -220,14 +215,25 @@ public class DependencyManager extends InjectableValues {
                 if (dep.getClass().getName().equalsIgnoreCase(key)) return dep;
             }
 
+            if (optional) {
+                return null;
+            }
+
             ctxt.reportInputMismatch(forProperty,
                     "No injectable value found for key: %s", key);
-        } else {
-            ctxt.reportInputMismatch(forProperty,
-                    "Unrecognized inject value id type (%s), expecting Class or String",
-                    valueId.getClass().getName());
+        } else if (optional) {
+            return null;
         }
 
+        ctxt.reportInputMismatch(forProperty,
+                "Unrecognized inject value id type (%s), expecting Class or String",
+                valueId.getClass().getName());
+
+        return null;
+    }
+
+    @Override
+    public InjectableValues snapshot() {
         return null;
     }
 }