diff --git a/Cargo.lock b/Cargo.lock
index 72da197..208ece1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -493,12 +493,12 @@ dependencies = [
 
 [[package]]
 name = "deranged"
-version = "0.4.0"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c9e6a11ca8224451684bc0d7d5a7adbf8f2fd6887261a1cfc3c0432f9d4068e"
+checksum = "ececcb659e7ba858fb4f10388c250a7252eb0a27373f1a72b8748afdd248e587"
 dependencies = [
  "powerfmt",
- "serde",
+ "serde_core",
 ]
 
 [[package]]
@@ -2724,10 +2724,11 @@ checksum = "56e6fa9c48d24d85fb3de5ad847117517440f6beceb7798af16b4a87d616b8d0"
 
 [[package]]
 name = "serde"
-version = "1.0.219"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
 dependencies = [
+ "serde_core",
  "serde_derive",
 ]
 
@@ -2766,11 +2767,20 @@ dependencies = [
  "typeid",
 ]
 
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
 [[package]]
 name = "serde_derive"
-version = "1.0.219"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3170,9 +3180,9 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.41"
+version = "0.3.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a7619e19bc266e0f9c5e6686659d394bc57973859340060a69221e57dbc0c40"
+checksum = "91e7d9e3bb61134e77bde20dd4825b97c010155709965fedf0f49bb138e52a9d"
 dependencies = [
  "deranged",
  "itoa",
@@ -3187,15 +3197,15 @@ dependencies = [
 
 [[package]]
 name = "time-core"
-version = "0.1.4"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9e9a38711f559d9e3ce1cdb06dd7c5b8ea546bc90052da6d06bb76da74bb07c"
+checksum = "40868e7c1d2f0b8d73e4a8c7f0ff63af4f6d19be117e90bd73eb1d62cf831c6b"
 
 [[package]]
 name = "time-macros"
-version = "0.2.22"
+version = "0.2.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3526739392ec93fd8b359c8e98514cb3e8e021beb4e5f597b00a0221f8ed8a49"
+checksum = "30cfb0125f12d9c277f35663a0a33f8c30190f4e4574868a330595412d34ebf3"
 dependencies = [
  "num-conv",
  "time-core",
@@ -3509,6 +3519,7 @@ dependencies = [
  "serde_urlencoded",
  "sheets",
  "slack-with-types",
+ "time",
  "tokio",
  "tower",
  "tower-http",
diff --git a/Cargo.toml b/Cargo.toml
index b2a9a40..8f95aaa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,6 +44,7 @@ serde_json = "1"
 serde_urlencoded = "0.7.1"
 sheets = "0.7.0"
 slack-with-types = "0.1.1"
+time = "0.3.44"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 tower = "0.5.2"
 tower-http = { version = "0.6.6", features = ["fs"] }
diff --git a/src/bin/trainee-tracker.rs b/src/bin/trainee-tracker.rs
index 5f04425..ac9a59b 100644
--- a/src/bin/trainee-tracker.rs
+++ b/src/bin/trainee-tracker.rs
@@ -47,7 +47,7 @@ async fn main() {
     let session_store = MemoryStore::default();
     let session_layer = SessionManagerLayer::new(session_store)
         .with_secure(is_secure)
-        .with_expiry(Expiry::OnSessionEnd);
+        .with_expiry(Expiry::OnInactivity(time::Duration::HOUR));
 
     let app = axum::Router::new()
         .route("/api/ok", get(trainee_tracker::endpoints::health_check))