diff --git a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
index d60a77f4..2f3b7b6b 100644
--- a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
+++ b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
@@ -256,6 +256,7 @@ public void markOptional(OptionalFile file) {
 
         if (file.mark) return;
         file.mark = true;
+        file.notifyObservers(true);
         if (file.dependencies != null) {
             for (OptionalFile dep : file.dependencies) {
                 if (dep.dependenciesCount == null) dep.dependenciesCount = new HashSet<>();
@@ -283,6 +284,7 @@ public void unmarkOptional(String name, OptionalType type) {
     public void unmarkOptional(OptionalFile file) {
         if (!file.mark) return;
         file.mark = false;
+        file.notifyObservers(false);
         if (file.dependenciesCount != null) {
             for (OptionalFile f : file.dependenciesCount) {
                 if (f.isPreset) continue;
diff --git a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/optional/OptionalFile.java b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/optional/OptionalFile.java
index 43d5f22a..237deb22 100644
--- a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/optional/OptionalFile.java
+++ b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/optional/OptionalFile.java
@@ -7,9 +7,10 @@
 
 import java.io.IOException;
 import java.util.Objects;
+import java.util.Observable;
 import java.util.Set;
 
-public class OptionalFile {
+public class OptionalFile extends Observable {
     @LauncherNetworkAPI
     public String[] list;
     @LauncherNetworkAPI