diff --git a/gradle.properties b/gradle.properties
index 6925aed..f9aa6c1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,7 +6,7 @@ minecraft_version=1.21.1
 yarn_mappings=1.21.1+build.3
 loader_version=0.16.2
 # Mod Properties
-mod_version=1.4.4
+mod_version=1.4.5
 maven_group=systems.brn
 archives_base_name=servershop
 # Dependencies
diff --git a/src/main/java/systems/brn/servershop/commands/StoreCommands.java b/src/main/java/systems/brn/servershop/commands/StoreCommands.java
index f9c5161..31846eb 100644
--- a/src/main/java/systems/brn/servershop/commands/StoreCommands.java
+++ b/src/main/java/systems/brn/servershop/commands/StoreCommands.java
@@ -41,7 +41,7 @@ public class StoreCommands {
         ItemStack itemStack = new ItemStack(item, count);
         ServerPlayerEntity player = ctx.getSource().getPlayer();
         if (player != null) {
-            sell(itemStack, player, false);
+            sell(itemStack.copy(), player, false);
             return 0;
         }
         return 1;
@@ -52,7 +52,7 @@ public class StoreCommands {
         ItemStack itemStack = new ItemStack(item);
         ServerPlayerEntity player = ctx.getSource().getPlayer();
         if (player != null) {
-            sell(itemStack, player, false);
+            sell(itemStack.copy(), player, false);
             return 0;
         }
         return 1;
diff --git a/src/main/java/systems/brn/servershop/screens/BalanceScreen.java b/src/main/java/systems/brn/servershop/screens/BalanceScreen.java
index edd7766..ce6d5e7 100644
--- a/src/main/java/systems/brn/servershop/screens/BalanceScreen.java
+++ b/src/main/java/systems/brn/servershop/screens/BalanceScreen.java
@@ -61,7 +61,7 @@ public class BalanceScreen extends PagedGui implements SearchableInterface {
 
     @Override
     public boolean insertItem(ItemStack stack, int startIndex, int endIndex, boolean fromLast) {
-        sell(stack, player, true);
+        sell(stack.copy(), player, true);
         return super.insertItem(stack, startIndex, endIndex, fromLast);
     }
 
diff --git a/src/main/java/systems/brn/servershop/screens/ShopScreen.java b/src/main/java/systems/brn/servershop/screens/ShopScreen.java
index 0413987..8bf3ffb 100644
--- a/src/main/java/systems/brn/servershop/screens/ShopScreen.java
+++ b/src/main/java/systems/brn/servershop/screens/ShopScreen.java
@@ -80,7 +80,7 @@ public class ShopScreen extends PagedGui implements SearchableInterface {
 
     @Override
     public boolean insertItem(ItemStack stack, int startIndex, int endIndex, boolean fromLast) {
-        sell(stack, player, true);
+        sell(stack.copy(), player, true);
         return super.insertItem(stack, startIndex, endIndex, fromLast);
     }