diff --git a/build-number.txt b/build-number.txt
index a10e1ce0..3d2b7eb6 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-1785
\ No newline at end of file
+1786
\ No newline at end of file
diff --git a/src/main/java/me/chayapak1/chomens_bot/evalFunctions/CoreFunction.java b/src/main/java/me/chayapak1/chomens_bot/evalFunctions/CoreFunction.java
index cfb71bb6..3687a2ca 100644
--- a/src/main/java/me/chayapak1/chomens_bot/evalFunctions/CoreFunction.java
+++ b/src/main/java/me/chayapak1/chomens_bot/evalFunctions/CoreFunction.java
@@ -9,6 +9,8 @@ import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeUnit;
 
 public class CoreFunction extends EvalFunction {
+    private long lastExecutionTime = System.currentTimeMillis();
+
     public CoreFunction (Bot bot) {
         super("core", bot);
     }
@@ -17,6 +19,10 @@ public class CoreFunction extends EvalFunction {
     public Output execute(Object... args) throws Exception {
         if (args.length == 0) return null;
 
+        // prevent 69 DDOS exploit !!!
+        if (System.currentTimeMillis() - lastExecutionTime < 50) return null;
+        lastExecutionTime = System.currentTimeMillis();
+
         final String command = (String) args[0];
 
         final CompletableFuture<Component> future = bot.core.runTracked(command);