diff --git a/backend/canisters/proposals_bot/CHANGELOG.md b/backend/canisters/proposals_bot/CHANGELOG.md
index df26f1fdbc..90f8f074a5 100644
--- a/backend/canisters/proposals_bot/CHANGELOG.md
+++ b/backend/canisters/proposals_bot/CHANGELOG.md
@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [unreleased]
 
+### Fixed
+
+- Fix deadline timestamp on NNS proposals ([#5136](https://github.com/open-chat-labs/open-chat/pull/5136))
+
 ## [[2.0.998](https://github.com/open-chat-labs/open-chat/releases/tag/v2.0.998-proposals_bot)] - 2024-01-05
 
 ### Added
diff --git a/backend/canisters/proposals_bot/impl/src/model/nervous_systems.rs b/backend/canisters/proposals_bot/impl/src/model/nervous_systems.rs
index 048f843bfb..a99a64ff22 100644
--- a/backend/canisters/proposals_bot/impl/src/model/nervous_systems.rs
+++ b/backend/canisters/proposals_bot/impl/src/model/nervous_systems.rs
@@ -384,7 +384,7 @@ impl NervousSystem {
                 status: Some(proposal.status()),
                 reward_status: Some(proposal.reward_status()),
                 latest_tally: Some(proposal.tally()),
-                deadline: None,
+                deadline: Some(proposal.deadline()),
             };
             self.upsert_proposal_update(update);
         } else if let Some((previous, message_id)) = self.active_proposals.get_mut(&proposal_id) {
@@ -400,7 +400,6 @@ impl NervousSystem {
                 latest_tally: (latest_tally != previous.tally()).then_some(latest_tally),
                 deadline: (deadline != previous.deadline()).then_some(deadline),
             };
-
             self.upsert_proposal_update(update);
         } else {
             self.proposals_to_be_pushed.queue.insert(proposal_id, proposal);
@@ -436,6 +435,9 @@ impl NervousSystem {
                 if let Some(t) = update.latest_tally {
                     current.latest_tally = Some(t);
                 }
+                if let Some(d) = update.deadline {
+                    current.deadline = Some(d);
+                }
             }
             Vacant(e) => {
                 e.insert(update);
diff --git a/backend/external_canisters/nns_governance/api/src/types.rs b/backend/external_canisters/nns_governance/api/src/types.rs
index a7ba674e30..b8d5c2284f 100644
--- a/backend/external_canisters/nns_governance/api/src/types.rs
+++ b/backend/external_canisters/nns_governance/api/src/types.rs
@@ -696,7 +696,10 @@ impl TryFrom<ProposalInfo> for types::NnsProposal {
                 .try_into()
                 .map_err(|r| format!("unknown reward status: {r}"))?,
             tally: p.latest_tally.map(|t| t.into()).unwrap_or_default(),
-            deadline: p.deadline_timestamp_seconds.ok_or("deadline not set".to_string())?,
+            deadline: p
+                .deadline_timestamp_seconds
+                .map(|ts| ts * 1000)
+                .ok_or("deadline not set".to_string())?,
             payload_text_rendering: proposal
                 .action
                 .map(|a| serde_json::to_string_pretty(&a).unwrap_or("Failed to serialize payload".to_string())),
diff --git a/backend/libraries/types/src/proposals.rs b/backend/libraries/types/src/proposals.rs
index 09e17fd2ad..bd8e6870ea 100644
--- a/backend/libraries/types/src/proposals.rs
+++ b/backend/libraries/types/src/proposals.rs
@@ -93,6 +93,7 @@ pub struct NnsProposal {
     pub status: ProposalDecisionStatus,
     pub reward_status: ProposalRewardStatus,
     pub tally: Tally,
+    #[serde(skip_deserializing)]
     pub deadline: TimestampMillis,
     pub payload_text_rendering: Option<String>,
     pub last_updated: TimestampMillis,