diff --git a/mm2src/mm2_core/src/mm_ctx.rs b/mm2src/mm2_core/src/mm_ctx.rs
index 245b21af16..273882a656 100644
--- a/mm2src/mm2_core/src/mm_ctx.rs
+++ b/mm2src/mm2_core/src/mm_ctx.rs
@@ -60,7 +60,7 @@ pub struct HealthcheckConfig {
     pub blocking_ms_for_per_address: u64,
     /// Lifetime of the message.
     /// Do not change this unless you know what you are doing.
-    pub message_expiration: u64,
+    pub message_expiration_secs: u64,
     /// Maximum time (milliseconds) to wait for healthcheck response.
     pub timeout_secs: u64,
 }
@@ -69,7 +69,7 @@ impl Default for HealthcheckConfig {
     fn default() -> Self {
         Self {
             blocking_ms_for_per_address: 750,
-            message_expiration: 10,
+            message_expiration_secs: 10,
             timeout_secs: 10,
         }
     }
diff --git a/mm2src/mm2_main/src/lp_healthcheck.rs b/mm2src/mm2_main/src/lp_healthcheck.rs
index 9c9b543c1a..2971ac17bc 100644
--- a/mm2src/mm2_main/src/lp_healthcheck.rs
+++ b/mm2src/mm2_main/src/lp_healthcheck.rs
@@ -5,12 +5,13 @@ use common::{log, HttpStatusCode, StatusCode};
 use derive_more::Display;
 use futures::channel::oneshot::{self, Receiver, Sender};
 use instant::Duration;
-use mm2_core::mm_ctx::MmArc;
+use mm2_core::mm_ctx::{HealthcheckConfig, MmArc};
 use mm2_err_handle::prelude::MmError;
 use mm2_libp2p::{decode_message, encode_message, pub_sub_topic, Libp2pPublic, PeerId, TopicPrefix};
 use mm2_net::p2p::P2PContext;
 use ser_error_derive::SerializeErrorType;
 use serde::{Deserialize, Serialize};
+use std::convert::TryFrom;
 use std::convert::TryInto;
 use std::num::TryFromIntError;
 use std::str::FromStr;
@@ -52,14 +53,23 @@ impl HealthcheckMessage {
         Ok(Self { signature, data })
     }
 
-    pub(crate) fn is_received_message_valid(&self, my_peer_id: PeerId) -> bool {
+    pub(crate) fn is_received_message_valid(&self, my_peer_id: PeerId, healthcheck_config: &HealthcheckConfig) -> bool {
         let now = Utc::now().timestamp();
-        if now > self.data.expires_at {
+        let remaining_expiration_seconds = u64::try_from(self.data.expires_at - now).unwrap_or(0);
+
+        if remaining_expiration_seconds == 0 {
             log::debug!(
                 "Healthcheck message is expired. Current time in UTC: {now}, healthcheck `expires_at` in UTC: {}",
                 self.data.expires_at
             );
             return false;
+        } else if remaining_expiration_seconds > healthcheck_config.message_expiration_secs {
+            log::debug!(
+                "Healthcheck message have too high expiration time.\nMax allowed expiration seconds: {}\nReceived message expiration seconds: {}",
+                self.data.expires_at,
+                remaining_expiration_seconds,
+            );
+            return false;
         }
 
         if self.data.target_peer != my_peer_id {
@@ -264,7 +274,7 @@ pub async fn peer_connection_healthcheck_rpc(
         false,
         ctx.health_checker
             .config
-            .message_expiration
+            .message_expiration_secs
             .try_into()
             .map_err(|e: TryFromIntError| HealthcheckRpcError::Internal { reason: e.to_string() })?,
     )
@@ -329,7 +339,7 @@ pub(crate) async fn process_p2p_healthcheck_message(ctx: &MmArc, message: mm2_li
     // so KDF can handle a high amount of healthcheck messages more efficiently.
     ctx.spawner().spawn(async move {
         let my_peer_id = P2PContext::fetch_from_mm_arc(&ctx_c).peer_id();
-        if !data.is_received_message_valid(my_peer_id) {
+        if !data.is_received_message_valid(my_peer_id, &ctx_c.health_checker.config) {
             log::error!("Received an invalid healthcheck message.");
             log::debug!("Message context: {:?}", data);
             return;
@@ -403,7 +413,7 @@ mod tests {
         let ctx = ctx();
         let target_peer = create_test_peer_id();
         let message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
-        assert!(message.is_received_message_valid(target_peer));
+        assert!(message.is_received_message_valid(target_peer, &ctx.health_checker.config));
     });
 
     cross_test!(test_corrupted_messages, {
@@ -412,29 +422,29 @@ mod tests {
 
         let mut message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
         message.data.expires_at += 1;
-        assert!(!message.is_received_message_valid(target_peer));
+        assert!(!message.is_received_message_valid(target_peer, &ctx.health_checker.config));
 
         let mut message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
         message.data.is_a_reply = !message.data.is_a_reply;
-        assert!(!message.is_received_message_valid(target_peer));
+        assert!(!message.is_received_message_valid(target_peer, &ctx.health_checker.config));
 
         let mut message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
         message.data.sender_peer = message.data.target_peer;
-        assert!(!message.is_received_message_valid(target_peer));
+        assert!(!message.is_received_message_valid(target_peer, &ctx.health_checker.config));
 
         let mut message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
         message.data.target_peer = message.data.sender_peer;
-        assert!(!message.is_received_message_valid(target_peer));
+        assert!(!message.is_received_message_valid(target_peer, &ctx.health_checker.config));
 
         let message = HealthcheckMessage::generate_message(&ctx, target_peer, false, 5).unwrap();
-        assert!(!message.is_received_message_valid(message.data.sender_peer));
+        assert!(!message.is_received_message_valid(message.data.sender_peer, &ctx.health_checker.config));
     });
 
     cross_test!(test_expired_message, {
         let ctx = ctx();
         let target_peer = create_test_peer_id();
         let message = HealthcheckMessage::generate_message(&ctx, target_peer, false, -1).unwrap();
-        assert!(!message.is_received_message_valid(target_peer));
+        assert!(!message.is_received_message_valid(target_peer, &ctx.health_checker.config));
     });
 
     cross_test!(test_encode_decode, {