diff --git a/src/main/java/de/epiceric/shopchest/sql/Database.java b/src/main/java/de/epiceric/shopchest/sql/Database.java
index fa07404..918479c 100644
--- a/src/main/java/de/epiceric/shopchest/sql/Database.java
+++ b/src/main/java/de/epiceric/shopchest/sql/Database.java
@@ -21,6 +21,8 @@ import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.UUID;
@@ -227,10 +229,10 @@ public abstract class Database {
 
     /**
      * Get all shops from the database
-     * @param callback Callback that - if succeeded - returns an array of all shops (as {@code Shop[]})
+     * @param callback Callback that - if succeeded - returns a read-only collection of all shops (as {@code Collection<Shop>})
      * @param showConsoleMessages Whether console messages (errors or warnings) should be shown
      */
-    public void getShops(final boolean showConsoleMessages, final Callback<Shop[]> callback) {
+    public void getShops(final boolean showConsoleMessages, final Callback<Collection<Shop>> callback) {
         new BukkitRunnable() {
             @Override
             public void run() {
@@ -276,7 +278,7 @@ public abstract class Database {
                         shops.add(new Shop(id, plugin, vendor, product, location, buyPrice, sellPrice, shopType));
                     }
 
-                    if (callback != null) callback.callSyncResult(shops.toArray(new Shop[shops.size()]));
+                    if (callback != null) callback.callSyncResult(Collections.unmodifiableCollection(shops));
                 } catch (SQLException ex) {
                     if (callback != null) callback.callSyncError(ex);
                     plugin.getLogger().severe("Failed to access database");
diff --git a/src/main/java/de/epiceric/shopchest/utils/ShopUtils.java b/src/main/java/de/epiceric/shopchest/utils/ShopUtils.java
index ac03584..99a6bc0 100644
--- a/src/main/java/de/epiceric/shopchest/utils/ShopUtils.java
+++ b/src/main/java/de/epiceric/shopchest/utils/ShopUtils.java
@@ -242,9 +242,9 @@ public class ShopUtils {
                     plugin.debug("Removed shop (#" + shop.getID() + ")");
                 }
 
-                plugin.getShopDatabase().getShops(showConsoleMessages, new Callback<Shop[]>(plugin) {
+                plugin.getShopDatabase().getShops(showConsoleMessages, new Callback<Collection<Shop>>(plugin) {
                     @Override
-                    public void onResult(Shop[] result) {
+                    public void onResult(Collection<Shop> result) {
                         for (Shop shop : result) {
                             if (shop.create(showConsoleMessages)) {
                                 addShop(shop, false);
@@ -255,7 +255,7 @@ public class ShopUtils {
                             updateShops(player, true);
                         }
 
-                        if (callback != null) callback.callSyncResult(result.length);
+                        if (callback != null) callback.callSyncResult(result.size());
                     }
 
                     @Override