diff --git a/Cargo.lock b/Cargo.lock
index 1bb48e6..29db989 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -327,6 +327,7 @@ dependencies = [
  "deadpool-sqlite",
  "futures",
  "git2",
+ "humantime",
  "lockable",
  "log",
  "octocrab",
diff --git a/Cargo.toml b/Cargo.toml
index 869a75f..1578c32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,3 +31,4 @@ octocrab = "*"
 url = "*"
 lockable = "*"
 version-compare = "*"
+humantime = "*"
diff --git a/src/chat/mod.rs b/src/chat/mod.rs
index 479c0ee..f163e89 100644
--- a/src/chat/mod.rs
+++ b/src/chat/mod.rs
@@ -1,5 +1,6 @@
 use std::{collections::BTreeSet, fmt, sync::Arc};
 
+use chrono::Utc;
 use git2::{BranchType, Oid};
 use octocrab::models::IssueState;
 use teloxide::types::{ChatId, Message};
@@ -17,6 +18,7 @@ use crate::{
     condition::{Action, Condition},
     error::Error,
     github::{self, GitHubInfo},
+    options,
     repo::{cache::query_cache_commit, resources::RepoResources},
     utils::empty_or_start_new_line,
 };
@@ -275,18 +277,67 @@ pub async fn pr_issue_check(
         let commit = merged_pr_to_commit(resources, github_info, id, settings).await?;
         return Ok(PRIssueCheckResult::Merged(commit));
     }
-    if issue.state == IssueState::Closed {
-        {
+    match issue.state {
+        IssueState::Open => {
             let mut locked = resources.settings.write().await;
-            locked
+            let issue_settings = locked
                 .pr_issues
-                .remove(&id)
+                .get_mut(&id)
                 .ok_or(Error::UnknownPRIssue(id))?;
-        };
-        resources.save_settings().await?;
-        return Ok(PRIssueCheckResult::Closed);
+            match &issue_settings.closed_at {
+                Some(_) => {
+                    issue_settings.closed_at = None;
+                    drop(locked);
+                    resources.save_settings().await?;
+                    Ok(PRIssueCheckResult::Opened)
+                }
+                None => Ok(PRIssueCheckResult::Waiting),
+            }
+        }
+        IssueState::Closed => {
+            let mut locked = resources.settings.write().await;
+            let issue_settings = locked
+                .pr_issues
+                .get_mut(&id)
+                .ok_or(Error::UnknownPRIssue(id))?;
+            match issue_settings.closed_at {
+                None => {
+                    issue_settings.closed_at = Some(issue.closed_at.unwrap_or_else(Utc::now));
+                    drop(locked);
+                    resources.save_settings().await?;
+                    Ok(PRIssueCheckResult::Closed)
+                }
+                Some(closed_at) => {
+                    match (Utc::now() - closed_at).to_std() {
+                        Ok(duration) => {
+                            if duration >= *options::get().pr_issue_expire {
+                                // expired
+                                locked
+                                    .pr_issues
+                                    .remove(&id)
+                                    .ok_or(Error::UnknownPRIssue(id))?;
+                                drop(locked);
+                                resources.save_settings().await?;
+                                Ok(PRIssueCheckResult::Expired)
+                            } else {
+                                // not expired
+                                Ok(PRIssueCheckResult::Expiring)
+                            }
+                        }
+                        Err(e) => {
+                            log::error!("failed to calculate elapsed time for pr/issue {id}: {e}");
+                            Ok(PRIssueCheckResult::Unknown)
+                        }
+                    }
+                }
+            }
+        }
+        // issue state is non-exhaustive
+        s => {
+            log::warn!("unknown issue state: {s:?}");
+            Ok(PRIssueCheckResult::Unknown)
+        }
     }
-    Ok(PRIssueCheckResult::Waiting)
 }
 
 pub async fn merged_pr_to_commit(
diff --git a/src/chat/results.rs b/src/chat/results.rs
index 75da427..fc573e0 100644
--- a/src/chat/results.rs
+++ b/src/chat/results.rs
@@ -45,6 +45,10 @@ pub struct BranchCheckResult {
 #[derive(Debug)]
 pub enum PRIssueCheckResult {
     Merged(String),
+    Opened,
     Closed,
     Waiting,
+    Expiring,
+    Expired,
+    Unknown,
 }
diff --git a/src/chat/settings.rs b/src/chat/settings.rs
index dbb7e77..18dd461 100644
--- a/src/chat/settings.rs
+++ b/src/chat/settings.rs
@@ -1,5 +1,6 @@
 use std::collections::{BTreeMap, BTreeSet};
 
+use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
 use teloxide::{types::User, utils::markdown};
 use url::Url;
@@ -26,6 +27,7 @@ pub struct CommitSettings {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PRIssueSettings {
     pub url: Url,
+    pub closed_at: Option<DateTime<Utc>>,
     #[serde(flatten)]
     pub notify: NotifySettings,
 }
diff --git a/src/main.rs b/src/main.rs
index a268df8..3264180 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -815,6 +815,7 @@ async fn pr_issue_add(
     let comment = optional_comment.unwrap_or_default();
     let settings = PRIssueSettings {
         url,
+        closed_at: None,
         notify: NotifySettings {
             comment,
             subscribers,
@@ -848,13 +849,15 @@ async fn pr_issue_check(bot: Bot, msg: Message, repo: String, id: u64) -> Result
             match result {
                 PRIssueCheckResult::Merged(commit) => commit_check(bot, msg, repo, commit).await,
                 PRIssueCheckResult::Closed => {
-                    reply_to_msg(
-                        &bot,
-                        &msg,
-                        format!("{pretty_id} has been closed \\(and removed\\)"),
-                    )
-                    .parse_mode(ParseMode::MarkdownV2)
-                    .await?;
+                    reply_to_msg(&bot, &msg, format!("{pretty_id} has been closed"))
+                        .parse_mode(ParseMode::MarkdownV2)
+                        .await?;
+                    Ok(())
+                }
+                PRIssueCheckResult::Opened => {
+                    reply_to_msg(&bot, &msg, format!("{pretty_id} has been opened"))
+                        .parse_mode(ParseMode::MarkdownV2)
+                        .await?;
                     Ok(())
                 }
                 PRIssueCheckResult::Waiting => {
@@ -874,6 +877,27 @@ async fn pr_issue_check(bot: Bot, msg: Message, repo: String, id: u64) -> Result
                     send.await?;
                     Ok(())
                 }
+                PRIssueCheckResult::Expiring => {
+                    let mut send = reply_to_msg(&bot, &msg, format!("{pretty_id} has been closed"))
+                        .parse_mode(ParseMode::MarkdownV2);
+                    send = try_attach_subscribe_button_markup(
+                        msg.chat.id,
+                        send,
+                        "p",
+                        &repo,
+                        &id.to_string(),
+                    );
+                    send.await?;
+                    Ok(())
+                }
+                PRIssueCheckResult::Expired => {
+                    log::info!("stopped tracking to pr/issue {id}");
+                    Ok(())
+                }
+                PRIssueCheckResult::Unknown => {
+                    log::warn!("issue {id} state unknown");
+                    Ok(())
+                }
             }
         }
         Err(Error::CommitExists(commit)) => {
diff --git a/src/message.rs b/src/message.rs
index ca461bc..d235a46 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -89,6 +89,18 @@ pub async fn pr_issue_id_pretty(resources: &RepoResources, id: u64) -> Result<St
     ))
 }
 
+pub async fn pr_issue_opened_message(
+    resources: &RepoResources,
+    id: u64,
+    settings: &PRIssueSettings,
+) -> Result<String, Error> {
+    Ok(format!(
+        "{pretty_id} has been opened{notify}",
+        pretty_id = pr_issue_id_pretty(resources, id).await?,
+        notify = empty_or_start_new_line(&settings.notify.subscribers_markdown()),
+    ))
+}
+
 pub async fn pr_issue_merged_message(
     resources: &RepoResources,
     id: u64,
diff --git a/src/options.rs b/src/options.rs
index 74d823d..2b03923 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -1,4 +1,5 @@
 use clap::Parser;
+use humantime::Duration;
 use std::path::PathBuf;
 
 #[derive(Debug, Parser)]
@@ -10,6 +11,8 @@ pub struct Options {
     pub cron: String,
     #[arg(short, long)]
     pub admin_chat_id: i64,
+    #[arg(short, long, default_value = "1week")]
+    pub pr_issue_expire: Duration,
 }
 
 pub static OPTIONS: once_cell::sync::OnceCell<Options> = once_cell::sync::OnceCell::new();
diff --git a/src/update.rs b/src/update.rs
index b7b219a..f01c73a 100644
--- a/src/update.rs
+++ b/src/update.rs
@@ -19,7 +19,7 @@ use crate::{
     condition::Action,
     message::{
         branch_check_message, commit_check_message, pr_issue_closed_message,
-        pr_issue_merged_message,
+        pr_issue_merged_message, pr_issue_opened_message,
     },
     options,
     repo::{self, resources::RepoResources},
@@ -162,6 +162,13 @@ async fn update_chat_repo_pr_issue(
                 .await?;
             Ok(())
         }
+        PRIssueCheckResult::Opened => {
+            let message = pr_issue_opened_message(repo_resources, id, settings).await?;
+            bot.send_message(chat, message)
+                .parse_mode(ParseMode::MarkdownV2)
+                .await?;
+            Ok(())
+        }
         PRIssueCheckResult::Closed => {
             let message = pr_issue_closed_message(repo_resources, id, settings).await?;
             bot.send_message(chat, message)
@@ -170,6 +177,15 @@ async fn update_chat_repo_pr_issue(
             Ok(())
         }
         PRIssueCheckResult::Waiting => Ok(()),
+        PRIssueCheckResult::Expiring => Ok(()),
+        PRIssueCheckResult::Expired => {
+            log::info!("stopped tracking to pr/issue {id}");
+            Ok(())
+        }
+        PRIssueCheckResult::Unknown => {
+            log::warn!("issue {id} state unknown");
+            Ok(())
+        }
     }
 }