diff --git a/logs/app.log b/logs/app.log
new file mode 100644
index 00000000..7c9faa98
--- /dev/null
+++ b/logs/app.log
@@ -0,0 +1,40 @@
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 17, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 20, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  5, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 12, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  8, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 10, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  8, counter value 18
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 12, counter value 17
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  3, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 13, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  4, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 11, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 13, counter value 13
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  4, counter value 12
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  3, counter value 13
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  1, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 11, counter value 11
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 14, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  6, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 15, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  1, counter value 10
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  9, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  6, counter value  8
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 16, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 19, counter value 20
+INFO core.basesyntax.Counter:18  Before decrementing, Thread # 18, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  9, counter value  7
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  2, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 19, counter value  5
+INFO core.basesyntax.Counter:18  Before decrementing, Thread #  7, counter value 20
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  2, counter value  3
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 18, counter value  4
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  7, counter value  2
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 16, counter value  6
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 14, counter value  9
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 20, counter value 15
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 10, counter value 16
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 17, counter value 19
+INFO core.basesyntax.Counter:21   After decrementing, Thread # 15, counter value  1
+INFO core.basesyntax.Counter:21   After decrementing, Thread #  5, counter value  0
diff --git a/src/main/java/core/basesyntax/Counter.java b/src/main/java/core/basesyntax/Counter.java
index 4af46bd4..6476a13b 100644
--- a/src/main/java/core/basesyntax/Counter.java
+++ b/src/main/java/core/basesyntax/Counter.java
@@ -1,22 +1,23 @@
 package core.basesyntax;
 
+import java.util.concurrent.atomic.AtomicInteger;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 public class Counter {
     private static final Logger logger = LogManager.getLogger(Counter.class);
     private static final String MESSAGE = "%20s, Thread # %2s, counter value %2d";
-    private int value;
+    private AtomicInteger value;
 
     public Counter(int value) {
-        this.value = value;
+        this.value = new AtomicInteger(value);
     }
 
     public void decreaseValue() {
         logger.info(String.format(MESSAGE,
-                "Before decrementing", Thread.currentThread().getName(), value));
-        value--;
+                "Before decrementing", Thread.currentThread().getName(), value.get()));
+        value.decrementAndGet();
         logger.info(String.format(MESSAGE,
-                "After decrementing", Thread.currentThread().getName(), value));
+                "After decrementing", Thread.currentThread().getName(), value.get()));
     }
 }