diff --git a/compiler/pavexc_cli/template/app/src/configuration.rs.liquid b/compiler/pavexc_cli/template/app/src/configuration.rs.liquid
index a89ef6a90..790af7e0e 100644
--- a/compiler/pavexc_cli/template/app/src/configuration.rs.liquid
+++ b/compiler/pavexc_cli/template/app/src/configuration.rs.liquid
@@ -40,26 +40,10 @@ pub struct ServerConfig {
     /// E.g. `1 minute` for a 1 minute timeout.
     ///
     /// Set the `PX_SERVER__GRACEFUL_SHUTDOWN_TIMEOUT` environment variable to override its value.
-    #[serde(deserialize_with = "deserialize_shutdown")]
+    #[serde(with = "pavex::time::fmt::serde::unsigned_duration::required")]
     pub graceful_shutdown_timeout: std::time::Duration,
 }
 
-fn deserialize_shutdown<'de, D>(deserializer: D) -> Result<std::time::Duration, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    use serde::Deserialize as _;
-
-    let duration = pavex::time::SignedDuration::deserialize(deserializer)?;
-    if duration.is_negative() {
-        Err(serde::de::Error::custom(
-            "graceful shutdown timeout must be positive",
-        ))
-    } else {
-        duration.try_into().map_err(serde::de::Error::custom)
-    }
-}
-
 impl ServerConfig {
     /// Bind a TCP listener according to the specified parameters.
     pub async fn listener(&self) -> Result<IncomingStream, std::io::Error> {
diff --git a/docs/tutorials/quickstart/project/app/src/configuration.rs b/docs/tutorials/quickstart/project/app/src/configuration.rs
index 2507f2f1f..cd8fb25d8 100644
--- a/docs/tutorials/quickstart/project/app/src/configuration.rs
+++ b/docs/tutorials/quickstart/project/app/src/configuration.rs
@@ -25,26 +25,10 @@ pub struct ServerConfig {
     /// E.g. `1 minute` for a 1 minute timeout.
     ///
     /// Set the `PX_SERVER__GRACEFUL_SHUTDOWN_TIMEOUT` environment variable to override its value.
-    #[serde(deserialize_with = "deserialize_shutdown")]
+    #[serde(with = "pavex::time::fmt::serde::unsigned_duration::required")]
     pub graceful_shutdown_timeout: std::time::Duration,
 }
 
-fn deserialize_shutdown<'de, D>(deserializer: D) -> Result<std::time::Duration, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    use serde::Deserialize as _;
-
-    let duration = pavex::time::SignedDuration::deserialize(deserializer)?;
-    if duration.is_negative() {
-        Err(serde::de::Error::custom(
-            "graceful shutdown timeout must be positive",
-        ))
-    } else {
-        duration.try_into().map_err(serde::de::Error::custom)
-    }
-}
-
 impl ServerConfig {
     /// Bind a TCP listener according to the specified parameters.
     pub async fn listener(&self) -> Result<IncomingStream, std::io::Error> {
diff --git a/examples/realworld/app/src/configuration.rs b/examples/realworld/app/src/configuration.rs
index 24d0cdc8d..604a03428 100644
--- a/examples/realworld/app/src/configuration.rs
+++ b/examples/realworld/app/src/configuration.rs
@@ -26,26 +26,10 @@ pub struct ServerConfig {
     /// E.g. `1 minute` for a 1 minute timeout.
     ///
     /// Set the `PX_SERVER__GRACEFUL_SHUTDOWN_TIMEOUT` environment variable to override its value.
-    #[serde(deserialize_with = "deserialize_shutdown")]
+    #[serde(with = "pavex::time::fmt::serde::unsigned_duration::required")]
     pub graceful_shutdown_timeout: std::time::Duration,
 }
 
-fn deserialize_shutdown<'de, D>(deserializer: D) -> Result<std::time::Duration, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    use serde::Deserialize as _;
-
-    let duration = pavex::time::SignedDuration::deserialize(deserializer)?;
-    if duration.is_negative() {
-        Err(serde::de::Error::custom(
-            "graceful shutdown timeout must be positive",
-        ))
-    } else {
-        duration.try_into().map_err(serde::de::Error::custom)
-    }
-}
-
 impl ServerConfig {
     /// Bind a TCP listener according to the specified parameters.
     pub async fn listener(&self) -> Result<IncomingStream, std::io::Error> {
diff --git a/examples/starter/app/src/configuration.rs b/examples/starter/app/src/configuration.rs
index 03aa39ecf..3bf2f2b93 100644
--- a/examples/starter/app/src/configuration.rs
+++ b/examples/starter/app/src/configuration.rs
@@ -37,26 +37,10 @@ pub struct ServerConfig {
     /// E.g. `1 minute` for a 1 minute timeout.
     ///
     /// Set the `PX_SERVER__GRACEFUL_SHUTDOWN_TIMEOUT` environment variable to override its value.
-    #[serde(deserialize_with = "deserialize_shutdown")]
+    #[serde(with = "pavex::time::fmt::serde::unsigned_duration::required")]
     pub graceful_shutdown_timeout: std::time::Duration,
 }
 
-fn deserialize_shutdown<'de, D>(deserializer: D) -> Result<std::time::Duration, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    use serde::Deserialize as _;
-
-    let duration = pavex::time::SignedDuration::deserialize(deserializer)?;
-    if duration.is_negative() {
-        Err(serde::de::Error::custom(
-            "graceful shutdown timeout must be positive",
-        ))
-    } else {
-        duration.try_into().map_err(serde::de::Error::custom)
-    }
-}
-
 impl ServerConfig {
     /// Bind a TCP listener according to the specified parameters.
     pub async fn listener(&self) -> Result<IncomingStream, std::io::Error> {