diff --git a/TMessagesProj/src/main/java/org/telegram/messenger/SharedConfig.java b/TMessagesProj/src/main/java/org/telegram/messenger/SharedConfig.java
index fc88ee67d..076241dd6 100644
--- a/TMessagesProj/src/main/java/org/telegram/messenger/SharedConfig.java
+++ b/TMessagesProj/src/main/java/org/telegram/messenger/SharedConfig.java
@@ -901,6 +901,10 @@ public class SharedConfig {
         }
 
         public WsProxy(WsLoader.Bean bean) {
+            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+                throw new RuntimeException(LocaleController.getString("MinApi21Required", R.string.MinApi21Required));
+            }
+
             this.bean = bean;
         }
 
diff --git a/TMessagesProj/src/main/java/org/telegram/ui/ProxyListActivity.java b/TMessagesProj/src/main/java/org/telegram/ui/ProxyListActivity.java
index 9aafc585a..5c66fcbaf 100644
--- a/TMessagesProj/src/main/java/org/telegram/ui/ProxyListActivity.java
+++ b/TMessagesProj/src/main/java/org/telegram/ui/ProxyListActivity.java
@@ -623,7 +623,10 @@ public class ProxyListActivity extends BaseFragment implements NotificationCente
 
         addItem.addSubItem(menu_add_input_socks, LocaleController.getString("AddProxySocks5", R.string.AddProxySocks5)).setOnClickListener((v) -> presentFragment(new ProxySettingsActivity(0)));
         addItem.addSubItem(menu_add_input_telegram, LocaleController.getString("AddProxyTelegram", R.string.AddProxyTelegram)).setOnClickListener((v) -> presentFragment(new ProxySettingsActivity(1)));
-        addItem.addSubItem(menu_add_input_ws, LocaleController.getString("AddProxyWs", R.string.AddProxyWs)).setOnClickListener((v) -> presentFragment(new WsSettingsActivity()));
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            addItem.addSubItem(menu_add_input_ws, LocaleController.getString("AddProxyWs", R.string.AddProxyWs)).setOnClickListener((v) -> presentFragment(new WsSettingsActivity()));
+        }
 
         if (!BuildVars.isMini) {