diff --git a/python/natsrpy/_natsrpy_rs/__init__.pyi b/python/natsrpy/_natsrpy_rs/__init__.pyi
index 8634ca6..7ecd342 100644
--- a/python/natsrpy/_natsrpy_rs/__init__.pyi
+++ b/python/natsrpy/_natsrpy_rs/__init__.pyi
@@ -100,8 +100,8 @@ class Nats:
         *,
         domain: str | None = None,
         api_prefix: str | None = None,
-        timeout: timedelta | None = None,
-        ack_timeout: timedelta | None = None,
+        timeout: float | timedelta | None = None,
+        ack_timeout: float | timedelta | None = None,
         concurrency_limit: int | None = None,
         max_ack_inflight: int | None = None,
         backpressure_on_inflight: bool | None = None,
diff --git a/python/natsrpy/_natsrpy_rs/js/consumers.pyi b/python/natsrpy/_natsrpy_rs/js/consumers.pyi
index fceec93..ff7408a 100644
--- a/python/natsrpy/_natsrpy_rs/js/consumers.pyi
+++ b/python/natsrpy/_natsrpy_rs/js/consumers.pyi
@@ -83,7 +83,7 @@ class PullConsumerConfig:
         delivery_start_sequence: int | None = None,
         delivery_start_time: int | None = None,
         ack_policy: AckPolicy | None = None,
-        ack_wait: timedelta | None = None,
+        ack_wait: float | timedelta | None = None,
         max_deliver: int | None = None,
         filter_subject: str | None = None,
         filter_subjects: list[str] | None = None,
@@ -95,12 +95,12 @@ class PullConsumerConfig:
         headers_only: bool | None = None,
         max_batch: int | None = None,
         max_bytes: int | None = None,
-        max_expires: timedelta | None = None,
-        inactive_threshold: timedelta | None = None,
+        max_expires: float | timedelta | None = None,
+        inactive_threshold: float | timedelta | None = None,
         num_replicas: int | None = None,
         memory_storage: bool | None = None,
         metadata: dict[str, str] | None = None,
-        backoff: list[timedelta] | None = None,
+        backoff: list[float | timedelta] | None = None,
         priority_policy: PriorityPolicy | None = None,
         priority_groups: list[str] | None = None,
         pause_until: int | None = None,
@@ -147,7 +147,7 @@ class PushConsumerConfig:
         delivery_start_sequence: int | None = None,
         delivery_start_time: int | None = None,
         ack_policy: AckPolicy | None = None,
-        ack_wait: timedelta | None = None,
+        ack_wait: float | timedelta | None = None,
         max_deliver: int | None = None,
         filter_subject: str | None = None,
         filter_subjects: list[str] | None = None,
@@ -158,12 +158,12 @@ class PushConsumerConfig:
         max_ack_pending: int | None = None,
         headers_only: bool | None = None,
         flow_control: bool | None = None,
-        idle_heartbeat: timedelta | None = None,
+        idle_heartbeat: float | timedelta | None = None,
         num_replicas: int | None = None,
         memory_storage: bool | None = None,
         metadata: dict[str, str] | None = None,
-        backoff: list[timedelta] | None = None,
-        inactive_threshold: timedelta | None = None,
+        backoff: list[float | timedelta] | None = None,
+        inactive_threshold: float | timedelta | None = None,
         pause_until: int | None = None,
     ) -> Self: ...
 
@@ -188,8 +188,8 @@ class PullConsumer:
         group: str | None = None,
         priority: int | None = None,
         max_bytes: int | None = None,
-        heartbeat: timedelta | None = None,
-        expires: timedelta | None = None,
+        heartbeat: float | timedelta | None = None,
+        expires: float | timedelta | None = None,
         min_pending: int | None = None,
         min_ack_pending: int | None = None,
         timeout: float | timedelta | None = None,
diff --git a/python/natsrpy/_natsrpy_rs/js/kv.pyi b/python/natsrpy/_natsrpy_rs/js/kv.pyi
index b460265..db65439 100644
--- a/python/natsrpy/_natsrpy_rs/js/kv.pyi
+++ b/python/natsrpy/_natsrpy_rs/js/kv.pyi
@@ -93,7 +93,7 @@ class KVConfig:
         description: str | None = None,
         max_value_size: int | None = None,
         history: int | None = None,
-        max_age: float | None = None,
+        max_age: float | timedelta | None = None,
         max_bytes: int | None = None,
         storage: StorageType | None = None,
         num_replicas: int | None = None,
@@ -103,7 +103,7 @@ class KVConfig:
         mirror_direct: bool | None = None,
         compression: bool | None = None,
         placement: Placement | None = None,
-        limit_markers: float | None = None,
+        limit_markers: float | timedelta | None = None,
     ) -> Self: ...
 
 @final
diff --git a/python/natsrpy/_natsrpy_rs/js/stream.pyi b/python/natsrpy/_natsrpy_rs/js/stream.pyi
index b2cb633..afc0489 100644
--- a/python/natsrpy/_natsrpy_rs/js/stream.pyi
+++ b/python/natsrpy/_natsrpy_rs/js/stream.pyi
@@ -167,12 +167,12 @@ class StreamConfig:
         discard_new_per_subject: bool | None = None,
         retention: RetentionPolicy | None = None,
         max_consumers: int | None = None,
-        max_age: timedelta | None = None,
+        max_age: float | timedelta | None = None,
         max_message_size: int | None = None,
         storage: StorageType | None = None,
         num_replicas: int | None = None,
         no_ack: bool | None = None,
-        duplicate_window: timedelta | None = None,
+        duplicate_window: float | timedelta | None = None,
         template_owner: str | None = None,
         sealed: bool | None = None,
         description: str | None = None,
@@ -193,7 +193,7 @@ class StreamConfig:
         persist_mode: PersistenceMode | None = None,
         pause_until: int | None = None,
         allow_message_ttl: bool | None = None,
-        subject_delete_marker_ttl: timedelta | None = None,
+        subject_delete_marker_ttl: float | timedelta | None = None,
         allow_atomic_publish: bool | None = None,
         allow_message_schedules: bool | None = None,
         allow_message_counter: bool | None = None,
diff --git a/src/js/consumers/pull/config.rs b/src/js/consumers/pull/config.rs
index fc8584a..f3c4f1d 100644
--- a/src/js/consumers/pull/config.rs
+++ b/src/js/consumers/pull/config.rs
@@ -3,6 +3,7 @@ use std::{collections::HashMap, time::Duration};
 use crate::{
     exceptions::rust_err::NatsrpyError,
     js::consumers::common::{AckPolicy, DeliverPolicy, PriorityPolicy, ReplayPolicy},
+    utils::py_types::TimeValue,
 };
 
 #[pyo3::pyclass(from_py_object, get_all, set_all)]
@@ -80,7 +81,7 @@ impl PullConsumerConfig {
         delivery_start_sequence: Option<u64>,
         delivery_start_time: Option<i64>,
         ack_policy: Option<AckPolicy>,
-        ack_wait: Option<Duration>,
+        ack_wait: Option<TimeValue>,
         max_deliver: Option<i64>,
         filter_subject: Option<String>,
         filter_subjects: Option<Vec<String>>,
@@ -92,12 +93,12 @@ impl PullConsumerConfig {
         headers_only: Option<bool>,
         max_batch: Option<i64>,
         max_bytes: Option<i64>,
-        max_expires: Option<Duration>,
-        inactive_threshold: Option<Duration>,
+        max_expires: Option<TimeValue>,
+        inactive_threshold: Option<TimeValue>,
         num_replicas: Option<usize>,
         memory_storage: Option<bool>,
         metadata: Option<HashMap<String, String>>,
-        backoff: Option<Vec<Duration>>,
+        backoff: Option<Vec<TimeValue>>,
         priority_policy: Option<PriorityPolicy>,
         priority_groups: Option<Vec<String>>,
         pause_until: Option<i64>,
@@ -114,7 +115,7 @@ impl PullConsumerConfig {
 
         conf.deliver_policy = deliver_policy.unwrap_or_default();
         conf.ack_policy = ack_policy.unwrap_or_default();
-        conf.ack_wait = ack_wait.unwrap_or_default();
+        conf.ack_wait = ack_wait.unwrap_or_default().into();
         conf.max_deliver = max_deliver.unwrap_or_default();
         conf.filter_subject = filter_subject.unwrap_or_default();
         conf.filter_subjects = filter_subjects.unwrap_or_default();
@@ -126,12 +127,16 @@ impl PullConsumerConfig {
         conf.headers_only = headers_only.unwrap_or_default();
         conf.max_batch = max_batch.unwrap_or_default();
         conf.max_bytes = max_bytes.unwrap_or_default();
-        conf.max_expires = max_expires.unwrap_or_default();
-        conf.inactive_threshold = inactive_threshold.unwrap_or_default();
+        conf.max_expires = max_expires.unwrap_or_default().into();
+        conf.inactive_threshold = inactive_threshold.unwrap_or_default().into();
         conf.num_replicas = num_replicas.unwrap_or_default();
         conf.memory_storage = memory_storage.unwrap_or_default();
         conf.metadata = metadata.unwrap_or_default();
-        conf.backoff = backoff.unwrap_or_default();
+        conf.backoff = backoff
+            .unwrap_or_default()
+            .into_iter()
+            .map(Into::into)
+            .collect();
         conf.priority_policy = priority_policy.unwrap_or_default();
         conf.priority_groups = priority_groups.unwrap_or_default();
 
diff --git a/src/js/consumers/pull/consumer.rs b/src/js/consumers/pull/consumer.rs
index 30264b6..8570e35 100644
--- a/src/js/consumers/pull/consumer.rs
+++ b/src/js/consumers/pull/consumer.rs
@@ -1,4 +1,4 @@
-use std::{sync::Arc, time::Duration};
+use std::sync::Arc;
 
 use futures_util::StreamExt;
 use pyo3::{Bound, PyAny, Python};
@@ -47,8 +47,8 @@ impl PullConsumer {
         group: Option<String>,
         priority: Option<usize>,
         max_bytes: Option<usize>,
-        heartbeat: Option<Duration>,
-        expires: Option<Duration>,
+        heartbeat: Option<TimeValue>,
+        expires: Option<TimeValue>,
         min_pending: Option<usize>,
         min_ack_pending: Option<usize>,
         timeout: Option<TimeValue>,
@@ -74,10 +74,10 @@ impl PullConsumer {
                 fetch_builder = fetch_builder.max_bytes(max_bytes);
             }
             if let Some(heartbeat) = heartbeat {
-                fetch_builder = fetch_builder.heartbeat(heartbeat);
+                fetch_builder = fetch_builder.heartbeat(heartbeat.into());
             }
             if let Some(expires) = expires {
-                fetch_builder = fetch_builder.expires(expires);
+                fetch_builder = fetch_builder.expires(expires.into());
             }
             if let Some(min_pending) = min_pending {
                 fetch_builder = fetch_builder.min_pending(min_pending);
diff --git a/src/js/consumers/push/config.rs b/src/js/consumers/push/config.rs
index 7b4df9f..1b516b9 100644
--- a/src/js/consumers/push/config.rs
+++ b/src/js/consumers/push/config.rs
@@ -3,6 +3,7 @@ use std::{collections::HashMap, time::Duration};
 use crate::{
     exceptions::rust_err::NatsrpyError,
     js::consumers::common::{AckPolicy, DeliverPolicy, ReplayPolicy},
+    utils::py_types::TimeValue,
 };
 
 #[pyo3::pyclass(from_py_object, get_all, set_all)]
@@ -81,7 +82,7 @@ impl PushConsumerConfig {
         delivery_start_sequence: Option<u64>,
         delivery_start_time: Option<i64>,
         ack_policy: Option<AckPolicy>,
-        ack_wait: Option<Duration>,
+        ack_wait: Option<TimeValue>,
         max_deliver: Option<i64>,
         filter_subject: Option<String>,
         filter_subjects: Option<Vec<String>>,
@@ -92,12 +93,12 @@ impl PushConsumerConfig {
         max_ack_pending: Option<i64>,
         headers_only: Option<bool>,
         flow_control: Option<bool>,
-        idle_heartbeat: Option<Duration>,
+        idle_heartbeat: Option<TimeValue>,
         num_replicas: Option<usize>,
         memory_storage: Option<bool>,
         metadata: Option<HashMap<String, String>>,
-        backoff: Option<Vec<Duration>>,
-        inactive_threshold: Option<Duration>,
+        backoff: Option<Vec<TimeValue>>,
+        inactive_threshold: Option<TimeValue>,
         pause_until: Option<i64>,
     ) -> Self {
         Self {
@@ -112,7 +113,7 @@ impl PushConsumerConfig {
 
             deliver_policy: deliver_policy.unwrap_or_default(),
             ack_policy: ack_policy.unwrap_or_default(),
-            ack_wait: ack_wait.unwrap_or_default(),
+            ack_wait: ack_wait.unwrap_or_default().into(),
             max_deliver: max_deliver.unwrap_or_default(),
             filter_subject: filter_subject.unwrap_or_default(),
             filter_subjects: filter_subjects.unwrap_or_default(),
@@ -123,12 +124,16 @@ impl PushConsumerConfig {
             max_ack_pending: max_ack_pending.unwrap_or_default(),
             headers_only: headers_only.unwrap_or_default(),
             flow_control: flow_control.unwrap_or_default(),
-            idle_heartbeat: idle_heartbeat.unwrap_or_default(),
+            idle_heartbeat: idle_heartbeat.unwrap_or_default().into(),
             num_replicas: num_replicas.unwrap_or_default(),
             memory_storage: memory_storage.unwrap_or_default(),
             metadata: metadata.unwrap_or_default(),
-            backoff: backoff.unwrap_or_default(),
-            inactive_threshold: inactive_threshold.unwrap_or_default(),
+            backoff: backoff
+                .unwrap_or_default()
+                .into_iter()
+                .map(Into::into)
+                .collect(),
+            inactive_threshold: inactive_threshold.unwrap_or_default().into(),
         }
     }
 }
diff --git a/src/js/kv.rs b/src/js/kv.rs
index a34ead4..59bdd92 100644
--- a/src/js/kv.rs
+++ b/src/js/kv.rs
@@ -61,12 +61,12 @@ impl KVConfig {
         limit_markers=None,
     ))]
     #[must_use]
-    pub const fn __new__(
+    pub fn __new__(
         bucket: String,
         description: Option<String>,
         max_value_size: Option<i32>,
         history: Option<i64>,
-        max_age: Option<Duration>,
+        max_age: Option<TimeValue>,
         max_bytes: Option<i64>,
         storage: Option<js::stream::StorageType>,
         num_replicas: Option<usize>,
@@ -76,14 +76,14 @@ impl KVConfig {
         mirror_direct: Option<bool>,
         compression: Option<bool>,
         placement: Option<js::stream::Placement>,
-        limit_markers: Option<Duration>,
+        limit_markers: Option<TimeValue>,
     ) -> Self {
         Self {
             bucket,
             description,
             max_value_size,
             history,
-            max_age,
+            max_age: max_age.map(Into::into),
             max_bytes,
             storage,
             num_replicas,
@@ -93,7 +93,7 @@ impl KVConfig {
             mirror_direct,
             compression,
             placement,
-            limit_markers,
+            limit_markers: limit_markers.map(Into::into),
         }
     }
 }
diff --git a/src/js/stream.rs b/src/js/stream.rs
index f78f891..0ce2845 100644
--- a/src/js/stream.rs
+++ b/src/js/stream.rs
@@ -160,9 +160,9 @@ pub struct ConsumerLimits {
 impl ConsumerLimits {
     #[new]
     #[must_use]
-    pub const fn __new__(inactive_threshold: Duration, max_ack_pending: i64) -> Self {
+    pub fn __new__(inactive_threshold: TimeValue, max_ack_pending: i64) -> Self {
         Self {
-            inactive_threshold,
+            inactive_threshold: inactive_threshold.into(),
             max_ack_pending,
         }
     }
@@ -595,12 +595,12 @@ impl StreamConfig {
         discard_new_per_subject: Option<bool>,
         retention: Option<RetentionPolicy>,
         max_consumers: Option<i32>,
-        max_age: Option<Duration>,
+        max_age: Option<TimeValue>,
         max_message_size: Option<i32>,
         storage: Option<StorageType>,
         num_replicas: Option<usize>,
         no_ack: Option<bool>,
-        duplicate_window: Option<Duration>,
+        duplicate_window: Option<TimeValue>,
         template_owner: Option<String>,
         sealed: Option<bool>,
         description: Option<String>,
@@ -621,7 +621,7 @@ impl StreamConfig {
         persist_mode: Option<PersistenceMode>,
         pause_until: Option<i64>,
         allow_message_ttl: Option<bool>,
-        subject_delete_marker_ttl: Option<Duration>,
+        subject_delete_marker_ttl: Option<TimeValue>,
         allow_atomic_publish: Option<bool>,
         allow_message_schedules: Option<bool>,
         allow_message_counter: Option<bool>,
@@ -640,8 +640,8 @@ impl StreamConfig {
             placement,
             persist_mode,
             pause_until,
-            subject_delete_marker_ttl,
 
+            subject_delete_marker_ttl: subject_delete_marker_ttl.map(Into::into),
             max_bytes: max_bytes.unwrap_or_default(),
             max_messages: max_messages.unwrap_or_default(),
             max_messages_per_subject: max_messages_per_subject.unwrap_or_default(),
@@ -649,12 +649,12 @@ impl StreamConfig {
             discard_new_per_subject: discard_new_per_subject.unwrap_or_default(),
             retention: retention.unwrap_or_default(),
             max_consumers: max_consumers.unwrap_or_default(),
-            max_age: max_age.unwrap_or_default(),
+            max_age: max_age.unwrap_or_default().into(),
             max_message_size: max_message_size.unwrap_or_default(),
             storage: storage.unwrap_or_default(),
             num_replicas: num_replicas.unwrap_or_default(),
             no_ack: no_ack.unwrap_or_default(),
-            duplicate_window: duplicate_window.unwrap_or_default(),
+            duplicate_window: duplicate_window.unwrap_or_default().into(),
             template_owner: template_owner.unwrap_or_default(),
             sealed: sealed.unwrap_or_default(),
             allow_rollup: allow_rollup.unwrap_or_default(),
diff --git a/src/nats_cls.rs b/src/nats_cls.rs
index f6c4bfb..ee48c51 100644
--- a/src/nats_cls.rs
+++ b/src/nats_cls.rs
@@ -3,7 +3,7 @@ use pyo3::{
     Bound, IntoPyObjectExt, Py, PyAny, Python,
     types::{PyBytes, PyBytesMethods, PyDict},
 };
-use std::{sync::Arc, time::Duration};
+use std::sync::Arc;
 use tokio::sync::RwLock;
 
 use crate::{
@@ -161,7 +161,7 @@ impl NatsCls {
         payload: Option<Bound<PyBytes>>,
         headers: Option<Bound<PyDict>>,
         inbox: Option<String>,
-        timeout: Option<Duration>,
+        timeout: Option<TimeValue>,
     ) -> NatsrpyResult<Bound<'py, PyAny>> {
         let session = self.nats_session.clone();
         let data = payload.map(|inner| bytes::Bytes::from(inner.as_bytes().to_vec()));
@@ -174,7 +174,7 @@ impl NatsCls {
                     payload: data,
                     headers: headermap,
                     inbox,
-                    timeout: timeout.map(Some),
+                    timeout: timeout.map(Into::into).map(Some),
                 };
                 session.send_request(subject, request).await?;
                 Ok(())
@@ -236,8 +236,8 @@ impl NatsCls {
         py: Python<'py>,
         domain: Option<String>,
         api_prefix: Option<String>,
-        timeout: Option<Duration>,
-        ack_timeout: Option<Duration>,
+        timeout: Option<TimeValue>,
+        ack_timeout: Option<TimeValue>,
         concurrency_limit: Option<usize>,
         max_ack_inflight: Option<usize>,
         backpressure_on_inflight: Option<bool>,
@@ -248,10 +248,10 @@ impl NatsCls {
             let mut builder =
                 async_nats::jetstream::ContextBuilder::new().concurrency_limit(concurrency_limit);
             if let Some(timeout) = ack_timeout {
-                builder = builder.ack_timeout(timeout);
+                builder = builder.ack_timeout(timeout.into());
             }
             if let Some(timeout) = timeout {
-                builder = builder.timeout(timeout);
+                builder = builder.timeout(timeout.into());
             }
             if let Some(max_ack_inflight) = max_ack_inflight {
                 builder = builder.max_ack_inflight(max_ack_inflight);
diff --git a/src/utils/py_types.rs b/src/utils/py_types.rs
index 99a4561..a712ac6 100644
--- a/src/utils/py_types.rs
+++ b/src/utils/py_types.rs
@@ -64,6 +64,12 @@ impl From<TimeValue> for Duration {
     }
 }
 
+impl Default for TimeValue {
+    fn default() -> Self {
+        Self::Duration(Duration::default())
+    }
+}
+
 impl<'py> FromPyObject<'_, 'py> for TimeValue {
     type Error = NatsrpyError;