diff --git a/Mage.Client/src/main/java/org/mage/card/arcane/ManaSymbols.java b/Mage.Client/src/main/java/org/mage/card/arcane/ManaSymbols.java
index 998b9763d66..a1b07dfce0b 100644
--- a/Mage.Client/src/main/java/org/mage/card/arcane/ManaSymbols.java
+++ b/Mage.Client/src/main/java/org/mage/card/arcane/ManaSymbols.java
@@ -25,6 +25,7 @@ import java.nio.file.attribute.BasicFileAttributes;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicIntegerArray;
 import java.util.regex.Pattern;
 import java.util.stream.IntStream;
 
@@ -288,7 +289,7 @@ public final class ManaSymbols {
         // priority: SVG -> GIF
         // gif remain for backward compatibility
 
-        int[] iconErrors = new int[2]; // 0 - svg, 1 - gif
+        AtomicIntegerArray iconErrors = new AtomicIntegerArray(2); // 0 - svg, 1 - gif
 
         AtomicBoolean fileErrors = new AtomicBoolean(false);
         Map<String, BufferedImage> sizedSymbols = new ConcurrentHashMap<>();
@@ -313,7 +314,7 @@ public final class ManaSymbols {
             // gif
             if (image == null) {
 
-                iconErrors[0] += 1; // svg fail
+                iconErrors.incrementAndGet(0); // svg fail
 
                 file = getSymbolFileNameAsGIF(symbol, size);
                 if (file.exists()) {
@@ -325,21 +326,21 @@ public final class ManaSymbols {
             if (image != null) {
                 sizedSymbols.put(symbol, image);
             } else {
-                iconErrors[1] += 1; // gif fail
+                iconErrors.incrementAndGet(1); // gif fail
                 fileErrors.set(true);
             }
         });
 
         // total errors
         String errorInfo = "";
-        if (iconErrors[0] > 0) {
-            errorInfo += "SVG fails - " + iconErrors[0];
+        if (iconErrors.get(0) > 0) {
+            errorInfo += "SVG fails - " + iconErrors.get(0);
         }
-        if (iconErrors[1] > 0) {
+        if (iconErrors.get(1) > 0) {
             if (!errorInfo.isEmpty()) {
                 errorInfo += ", ";
             }
-            errorInfo += "GIF fails - " + iconErrors[1];
+            errorInfo += "GIF fails - " + iconErrors.get(1);
         }
 
         if (!errorInfo.isEmpty()) {