diff --git a/src/negative_report.rs b/src/negative_report.rs
index 843a2fb..273a1a2 100644
--- a/src/negative_report.rs
+++ b/src/negative_report.rs
@@ -41,12 +41,12 @@ impl NegativeReport {
         bridge_id: [u8; 20],
         bridge_pok: ProofOfBridgeKnowledge,
         country: String,
+        date: u32,
         distributor: BridgeDistributor,
     ) -> Self {
         let mut hasher = Sha1::new();
         hasher.update(bridge_id);
         let fingerprint: [u8; 20] = hasher.finalize().into();
-        let date = get_date();
         Self {
             fingerprint,
             bridge_pok,
@@ -61,17 +61,22 @@ impl NegativeReport {
         country: String,
         distributor: BridgeDistributor,
     ) -> Self {
+        let date = get_date();
         let bridge_pok =
-            ProofOfBridgeKnowledge::HashOfBridgeLine(HashOfBridgeLine::new(&bridgeline));
-        NegativeReport::new(bridgeline.fingerprint, bridge_pok, country, distributor)
+            ProofOfBridgeKnowledge::HashOfBridgeLine(HashOfBridgeLine::new(&bridgeline, date));
+        NegativeReport::new(
+            bridgeline.fingerprint,
+            bridge_pok,
+            country,
+            date,
+            distributor,
+        )
     }
 
     pub fn from_lox_bucket(bridge_id: [u8; 20], bucket: Scalar, country: String) -> Self {
-        let mut hasher = Sha3_256::new();
-        hasher.update(bucket.to_bytes());
-        let bucket_hash: [u8; 32] = hasher.finalize().into();
-        let bridge_pok = ProofOfBridgeKnowledge::HashOfBucket(HashOfBucket { hash: bucket_hash });
-        NegativeReport::new(bridge_id, bridge_pok, country, BridgeDistributor::Lox)
+        let date = get_date();
+        let bridge_pok = ProofOfBridgeKnowledge::HashOfBucket(HashOfBucket::new(&bucket, date));
+        NegativeReport::new(bridge_id, bridge_pok, country, date, BridgeDistributor::Lox)
     }
 
     pub fn from_lox_credential(bridge_id: [u8; 20], cred: Lox, country: String) -> Self {
@@ -114,12 +119,12 @@ impl NegativeReport {
     pub fn verify(self, bridge_info: &BridgeVerificationInfo) -> bool {
         match self.bridge_pok {
             ProofOfBridgeKnowledge::HashOfBridgeLine(pok) => {
-                let hash = HashOfBridgeLine::new(&bridge_info.bridge_line);
+                let hash = HashOfBridgeLine::new(&bridge_info.bridge_line, self.date);
                 hash == pok
             }
             ProofOfBridgeKnowledge::HashOfBucket(pok) => {
                 for b in &bridge_info.buckets {
-                    let hash = HashOfBucket::new(&b);
+                    let hash = HashOfBucket::new(&b, self.date);
                     if hash == pok {
                         return true;
                     }
@@ -179,8 +184,9 @@ pub struct HashOfBridgeLine {
 }
 
 impl HashOfBridgeLine {
-    pub fn new(bl: &BridgeLine) -> Self {
+    pub fn new(bl: &BridgeLine, date: u32) -> Self {
         let mut hasher = Sha3_256::new();
+        hasher.update(date.to_le_bytes());
         hasher.update(bincode::serialize(&bl).unwrap());
         let hash: [u8; 32] = hasher.finalize().into();
         Self { hash }
@@ -194,8 +200,9 @@ pub struct HashOfBucket {
 }
 
 impl HashOfBucket {
-    pub fn new(bucket: &Scalar) -> Self {
+    pub fn new(bucket: &Scalar, date: u32) -> Self {
         let mut hasher = Sha3_256::new();
+        hasher.update(date.to_le_bytes());
         hasher.update(bucket.to_bytes());
         let hash: [u8; 32] = hasher.finalize().into();
         Self { hash }
diff --git a/src/tests.rs b/src/tests.rs
index ea8d13f..1c2fe27 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -204,19 +204,26 @@ fn test_negative_reports() {
 
     // Check that verification fails with incorrect data
 
+    let date = get_date();
+
     // Incorrect BridgeLine hash
     let invalid_report_3 = NegativeReport::new(
         bridges[0].fingerprint,
-        ProofOfBridgeKnowledge::HashOfBridgeLine(HashOfBridgeLine::new(&BridgeLine::default())),
+        ProofOfBridgeKnowledge::HashOfBridgeLine(HashOfBridgeLine::new(
+            &BridgeLine::default(),
+            date,
+        )),
         "ru".to_string(),
+        date,
         BridgeDistributor::Lox,
     );
 
     // Incorrect bucket hash
     let invalid_report_4 = NegativeReport::new(
         bridges[1].fingerprint,
-        ProofOfBridgeKnowledge::HashOfBucket(HashOfBucket::new(&Scalar::ZERO)),
+        ProofOfBridgeKnowledge::HashOfBucket(HashOfBucket::new(&Scalar::ZERO, date)),
         "ru".to_string(),
+        date,
         BridgeDistributor::Lox,
     );