diff --git a/src/main/java/ru/serega6531/packmate/model/Packet.java b/src/main/java/ru/serega6531/packmate/model/Packet.java
index 453d605..55fdfe0 100644
--- a/src/main/java/ru/serega6531/packmate/model/Packet.java
+++ b/src/main/java/ru/serega6531/packmate/model/Packet.java
@@ -6,6 +6,8 @@ import org.hibernate.annotations.GenericGenerator;
 import org.hibernate.annotations.Parameter;
 
 import jakarta.persistence.*;
+
+import java.time.Instant;
 import java.util.Objects;
 import java.util.Set;
 
@@ -45,7 +47,7 @@ public class Packet {
     @OneToMany(mappedBy = "packet", cascade = CascadeType.ALL, orphanRemoval = true)
     private Set<FoundPattern> matches;
 
-    private long timestamp;
+    private Instant timestamp;
 
     private boolean incoming; // true если от клиента к серверу, иначе false
 
diff --git a/src/main/java/ru/serega6531/packmate/model/Stream.java b/src/main/java/ru/serega6531/packmate/model/Stream.java
index c4f8879..b7471b6 100644
--- a/src/main/java/ru/serega6531/packmate/model/Stream.java
+++ b/src/main/java/ru/serega6531/packmate/model/Stream.java
@@ -10,6 +10,8 @@ import org.hibernate.annotations.Parameter;
 import ru.serega6531.packmate.model.enums.Protocol;
 
 import jakarta.persistence.*;
+
+import java.time.Instant;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
@@ -49,9 +51,9 @@ public class Stream {
     @ToString.Exclude
     private List<Packet> packets;
 
-    private long startTimestamp;
+    private Instant startTimestamp;
 
-    private long endTimestamp;
+    private Instant endTimestamp;
 
     @ManyToMany
     @JoinTable(
diff --git a/src/main/java/ru/serega6531/packmate/model/pojo/PacketDto.java b/src/main/java/ru/serega6531/packmate/model/pojo/PacketDto.java
index 3e6d697..ed3bc3b 100644
--- a/src/main/java/ru/serega6531/packmate/model/pojo/PacketDto.java
+++ b/src/main/java/ru/serega6531/packmate/model/pojo/PacketDto.java
@@ -1,7 +1,9 @@
 package ru.serega6531.packmate.model.pojo;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
+import java.time.Instant;
 import java.util.Set;
 
 @Data
@@ -9,7 +11,8 @@ public class PacketDto {
 
     private Long id;
     private Set<FoundPatternDto> matches;
-    private long timestamp;
+    @JsonFormat(shape = JsonFormat.Shape.NUMBER, without = JsonFormat.Feature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS)
+    private Instant timestamp;
     private boolean incoming;
     private boolean ungzipped;
     private boolean webSocketParsed;
diff --git a/src/main/java/ru/serega6531/packmate/model/pojo/StreamDto.java b/src/main/java/ru/serega6531/packmate/model/pojo/StreamDto.java
index 5f0fcb9..a34726b 100644
--- a/src/main/java/ru/serega6531/packmate/model/pojo/StreamDto.java
+++ b/src/main/java/ru/serega6531/packmate/model/pojo/StreamDto.java
@@ -1,8 +1,10 @@
 package ru.serega6531.packmate.model.pojo;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 import ru.serega6531.packmate.model.enums.Protocol;
 
+import java.time.Instant;
 import java.util.Set;
 
 @Data
@@ -11,8 +13,10 @@ public class StreamDto {
     private Long id;
     private int service;
     private Protocol protocol;
-    private long startTimestamp;
-    private long endTimestamp;
+    @JsonFormat(shape = JsonFormat.Shape.NUMBER, without = JsonFormat.Feature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS)
+    private Instant startTimestamp;
+    @JsonFormat(shape = JsonFormat.Shape.NUMBER, without = JsonFormat.Feature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS)
+    private Instant endTimestamp;
     private Set<Integer> foundPatternsIds;
     private boolean favorite;
     private int ttl;
diff --git a/src/main/java/ru/serega6531/packmate/pcap/AbstractPcapWorker.java b/src/main/java/ru/serega6531/packmate/pcap/AbstractPcapWorker.java
index 08832ab..77a9e65 100644
--- a/src/main/java/ru/serega6531/packmate/pcap/AbstractPcapWorker.java
+++ b/src/main/java/ru/serega6531/packmate/pcap/AbstractPcapWorker.java
@@ -18,6 +18,8 @@ import ru.serega6531.packmate.service.StreamService;
 
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.time.Duration;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Map;
 import java.util.Optional;
@@ -82,7 +84,7 @@ public abstract class AbstractPcapWorker implements PcapWorker, PacketListener {
             return;
         }
 
-        final long time = pcap.getTimestamp().getTime();
+        final Instant time = pcap.getTimestamp().toInstant();
 
         if (rawPacket.contains(TcpPacket.class)) {
             final TcpPacket packet = rawPacket.get(TcpPacket.class);
@@ -93,7 +95,7 @@ public abstract class AbstractPcapWorker implements PcapWorker, PacketListener {
         }
     }
 
-    private void gotTcpPacket(TcpPacket packet, InetAddress sourceIp, InetAddress destIp, int ttl, long time) {
+    private void gotTcpPacket(TcpPacket packet, InetAddress sourceIp, InetAddress destIp, int ttl, Instant time) {
         final TcpPacket.TcpHeader tcpHeader = packet.getHeader();
         int sourcePort = tcpHeader.getSrcPort().valueAsInt();
         int destPort = tcpHeader.getDstPort().valueAsInt();
@@ -127,7 +129,7 @@ public abstract class AbstractPcapWorker implements PcapWorker, PacketListener {
         }
     }
 
-    private void gotUdpPacket(UdpPacket packet, InetAddress sourceIp, InetAddress destIp, int ttl, long time) {
+    private void gotUdpPacket(UdpPacket packet, InetAddress sourceIp, InetAddress destIp, int ttl, Instant time) {
         final UdpPacket.UdpHeader udpHeader = packet.getHeader();
         int sourcePort = udpHeader.getSrcPort().valueAsInt();
         int destPort = udpHeader.getDstPort().valueAsInt();
@@ -156,7 +158,7 @@ public abstract class AbstractPcapWorker implements PcapWorker, PacketListener {
         }
     }
 
-    private UnfinishedStream addNewPacket(InetAddress sourceIp, InetAddress destIp, long time,
+    private UnfinishedStream addNewPacket(InetAddress sourceIp, InetAddress destIp, Instant time,
                                           int sourcePort, int destPort, int ttl, byte[] content, Protocol protocol) {
         var incoming = destIp.equals(localIp);
         var stream = new UnfinishedStream(sourceIp, destIp, sourcePort, destPort, protocol);
@@ -222,17 +224,17 @@ public abstract class AbstractPcapWorker implements PcapWorker, PacketListener {
 
     @Override
     @SneakyThrows
-    public int closeTimeoutStreams(Protocol protocol, long timeoutMillis) {
+    public int closeTimeoutStreams(Protocol protocol, Duration timeout) {
         return processorExecutorService.submit(() -> {
             int streamsClosed = 0;
 
-            final long time = System.currentTimeMillis();
+            final Instant time = Instant.now();
             final var streams = (protocol == Protocol.TCP) ? this.unfinishedTcpStreams : this.unfinishedUdpStreams;
 
             final var oldStreams = Multimaps.asMap(streams).entrySet().stream()
                     .filter(entry -> {
                         final var packets = entry.getValue();
-                        return time - packets.get(packets.size() - 1).getTimestamp() > timeoutMillis;
+                        return Duration.between(packets.get(packets.size() - 1).getTimestamp(), time).compareTo(timeout) > 0;
                     })
                     .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
 
diff --git a/src/main/java/ru/serega6531/packmate/pcap/NoOpPcapWorker.java b/src/main/java/ru/serega6531/packmate/pcap/NoOpPcapWorker.java
index 174deb5..15b674d 100644
--- a/src/main/java/ru/serega6531/packmate/pcap/NoOpPcapWorker.java
+++ b/src/main/java/ru/serega6531/packmate/pcap/NoOpPcapWorker.java
@@ -2,6 +2,8 @@ package ru.serega6531.packmate.pcap;
 
 import ru.serega6531.packmate.model.enums.Protocol;
 
+import java.time.Duration;
+
 public class NoOpPcapWorker implements PcapWorker {
     @Override
     public void start() {
@@ -16,7 +18,7 @@ public class NoOpPcapWorker implements PcapWorker {
     }
 
     @Override
-    public int closeTimeoutStreams(Protocol protocol, long timeoutMillis) {
+    public int closeTimeoutStreams(Protocol protocol, Duration timeout) {
         return 0;
     }
 
diff --git a/src/main/java/ru/serega6531/packmate/pcap/PcapWorker.java b/src/main/java/ru/serega6531/packmate/pcap/PcapWorker.java
index eb81c78..a1e749a 100644
--- a/src/main/java/ru/serega6531/packmate/pcap/PcapWorker.java
+++ b/src/main/java/ru/serega6531/packmate/pcap/PcapWorker.java
@@ -3,6 +3,8 @@ package ru.serega6531.packmate.pcap;
 import org.pcap4j.core.PcapNativeException;
 import ru.serega6531.packmate.model.enums.Protocol;
 
+import java.time.Duration;
+
 public interface PcapWorker {
 
     void start() throws PcapNativeException;
@@ -16,7 +18,7 @@ public interface PcapWorker {
     /**
      * Выполняется в потоке обработчика
      */
-    int closeTimeoutStreams(Protocol protocol, long timeoutMillis);
+    int closeTimeoutStreams(Protocol protocol, Duration timeout);
 
     void setFilter(String filter);
 
diff --git a/src/main/java/ru/serega6531/packmate/properties/PackmateProperties.java b/src/main/java/ru/serega6531/packmate/properties/PackmateProperties.java
index 90fafc9..617ae50 100644
--- a/src/main/java/ru/serega6531/packmate/properties/PackmateProperties.java
+++ b/src/main/java/ru/serega6531/packmate/properties/PackmateProperties.java
@@ -5,6 +5,7 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 import ru.serega6531.packmate.model.enums.CaptureMode;
 
 import java.net.InetAddress;
+import java.time.Duration;
 
 @ConfigurationProperties("packmate")
 public record PackmateProperties(
@@ -24,8 +25,8 @@ public record PackmateProperties(
     ) {}
 
     public record TimeoutProperties(
-            int udpStreamTimeout,
-            int tcpStreamTimeout,
+            Duration udpStreamTimeout,
+            Duration tcpStreamTimeout,
             int checkInterval
     ){}
 
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/PacketsMerger.java b/src/main/java/ru/serega6531/packmate/service/optimization/PacketsMerger.java
index a66a17e..894f056 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/PacketsMerger.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/PacketsMerger.java
@@ -3,6 +3,7 @@ package ru.serega6531.packmate.service.optimization;
 import ru.serega6531.packmate.model.Packet;
 import ru.serega6531.packmate.utils.PacketUtils;
 
+import java.time.Instant;
 import java.util.List;
 
 public class PacketsMerger {
@@ -42,7 +43,7 @@ public class PacketsMerger {
      */
     private void compress(List<Packet> packets, int start, int end) {
         final List<Packet> cut = packets.subList(start, end);
-        final long timestamp = cut.get(0).getTimestamp();
+        final Instant timestamp = cut.get(0).getTimestamp();
         final boolean httpProcessed = cut.stream().anyMatch(Packet::isHttpProcessed);
         final boolean webSocketParsed = cut.stream().anyMatch(Packet::isWebSocketParsed);
         final boolean tlsDecrypted = cut.get(0).isTlsDecrypted();
diff --git a/src/main/java/ru/serega6531/packmate/tasks/TimeoutStreamsSaver.java b/src/main/java/ru/serega6531/packmate/tasks/TimeoutStreamsSaver.java
index 2befc9d..b2ca2a2 100644
--- a/src/main/java/ru/serega6531/packmate/tasks/TimeoutStreamsSaver.java
+++ b/src/main/java/ru/serega6531/packmate/tasks/TimeoutStreamsSaver.java
@@ -5,11 +5,11 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
-import ru.serega6531.packmate.properties.PackmateProperties;
 import ru.serega6531.packmate.model.enums.Protocol;
 import ru.serega6531.packmate.pcap.PcapWorker;
+import ru.serega6531.packmate.properties.PackmateProperties;
 
-import java.util.concurrent.TimeUnit;
+import java.time.Duration;
 
 @Component
 @Slf4j
@@ -17,15 +17,15 @@ import java.util.concurrent.TimeUnit;
 public class TimeoutStreamsSaver {
 
     private final PcapWorker pcapWorker;
-    private final long udpStreamTimeoutMillis;
-    private final long tcpStreamTimeoutMillis;
+    private final Duration udpStreamTimeoutMillis;
+    private final Duration tcpStreamTimeoutMillis;
 
     @Autowired
     public TimeoutStreamsSaver(PcapWorker pcapWorker,
                                PackmateProperties properties) {
         this.pcapWorker = pcapWorker;
-        this.udpStreamTimeoutMillis = TimeUnit.SECONDS.toMillis(properties.timeout().udpStreamTimeout());
-        this.tcpStreamTimeoutMillis = TimeUnit.SECONDS.toMillis(properties.timeout().tcpStreamTimeout());
+        this.udpStreamTimeoutMillis = properties.timeout().udpStreamTimeout();
+        this.tcpStreamTimeoutMillis = properties.timeout().tcpStreamTimeout();
     }
 
     @Scheduled(fixedRateString = "PT${packmate.timeout.check-interval}S", initialDelayString = "PT${packmate.timeout.check-interval}S")
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 274a3a3..da41726 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -28,8 +28,8 @@ packmate:
     account-login: BinaryBears
     account-password: 123456
   timeout:
-    udp-stream-timeout: 20 # seconds
-    tcp-stream-timeout: 40 # seconds
+    udp-stream-timeout: 20S
+    tcp-stream-timeout: 40S
     check-interval: 10 # seconds
   cleanup:
     enabled: true