diff --git a/src/main/java/lc/misc/HelperFunctions.java b/src/main/java/lc/misc/HelperFunctions.java
index bb7c868..2b37fc0 100644
--- a/src/main/java/lc/misc/HelperFunctions.java
+++ b/src/main/java/lc/misc/HelperFunctions.java
@@ -9,6 +9,10 @@ public class HelperFunctions {
 
   private static Random random = new Random(seed);
 
+  synchronized public static void setSeed(long seed){
+    random.setSeed(seed);
+  } 
+
   public static void setRenderingHints(Graphics2D g2d) {
     g2d.setRenderingHint(
         RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
diff --git a/src/main/scala/lc/core/config.scala b/src/main/scala/lc/core/config.scala
index fb08994..f2da049 100644
--- a/src/main/scala/lc/core/config.scala
+++ b/src/main/scala/lc/core/config.scala
@@ -50,7 +50,7 @@ object Config {
   val allowedMedia: Set[String] = captchaConfig.flatMap(_.allowedMedia).toSet
   val allowedInputType: Set[String] = captchaConfig.flatMap(_.allowedInputType).toSet
 
-  HelperFunctions.seed = seed
+  HelperFunctions.setSeed(seed)
 
   private def getDefaultConfig(): String = {
     val defaultConfigMap =