diff --git a/crates/arc-workflows/src/graph/types.rs b/crates/arc-workflows/src/graph/types.rs
index 893c87e22..4304a0cf3 100644
--- a/crates/arc-workflows/src/graph/types.rs
+++ b/crates/arc-workflows/src/graph/types.rs
@@ -421,7 +421,7 @@ impl Graph {
             .map_or(3, |v| v as usize)
     }
 
-    /// Graph-level `stall_timeout`. Defaults to 600s. Returns `None` when set to zero (disabled).
+    /// Graph-level `stall_timeout`. Defaults to 1800s. Returns `None` when set to zero (disabled).
     pub fn stall_timeout(&self) -> Option<Duration> {
         match self
             .attrs
@@ -430,7 +430,7 @@ impl Graph {
         {
             Some(d) if d.is_zero() => None,
             Some(d) => Some(d),
-            None => Some(Duration::from_secs(600)),
+            None => Some(Duration::from_secs(1800)),
         }
     }
 
@@ -732,7 +732,7 @@ mod tests {
     #[test]
     fn graph_stall_timeout_default() {
         let g = Graph::new("empty");
-        assert_eq!(g.stall_timeout(), Some(Duration::from_secs(600)));
+        assert_eq!(g.stall_timeout(), Some(Duration::from_secs(1800)));
     }
 
     #[test]
diff --git a/crates/arc-workflows/tests/integration.rs b/crates/arc-workflows/tests/integration.rs
index 03f103fd7..8f11f209f 100644
--- a/crates/arc-workflows/tests/integration.rs
+++ b/crates/arc-workflows/tests/integration.rs
@@ -12406,7 +12406,7 @@ impl Handler for SlowTestHandler {
 
 #[tokio::test]
 async fn e2e_stall_watchdog_with_explicit_timeout_override() {
-    // A short stall_timeout of 50ms should trigger faster than the default 600s.
+    // A short stall_timeout of 50ms should trigger faster than the default 1800s.
     // This tests that the graph attribute is actually respected.
     let dot = r#"digraph StallOverrideTest {
         graph [goal="Test stall override", stall_timeout="50ms", default_max_retry=0]
diff --git a/docs/execution/failures.mdx b/docs/execution/failures.mdx
index da45463c2..a44cc61a4 100644
--- a/docs/execution/failures.mdx
+++ b/docs/execution/failures.mdx
@@ -252,7 +252,7 @@ Arc runs a background watchdog that monitors event activity. If no events are em
 
 | Setting | Default |
 |---|---|
-| `stall_timeout` | 600 seconds (10 minutes) |
+| `stall_timeout` | 1800 seconds (30 minutes) |
 | Set to `0` | Disables the watchdog |
 
 ```dot title="example.dot"
diff --git a/docs/integrations/daytona.mdx b/docs/integrations/daytona.mdx
index f871a1ade..0638af75a 100644
--- a/docs/integrations/daytona.mdx
+++ b/docs/integrations/daytona.mdx
@@ -183,7 +183,7 @@ See [Private repositories](#private-repositories) above. You need a GitHub App c
 
 ### Stall watchdog kills the run
 
-Long-running commands in Daytona sandboxes may trigger the 600-second stall watchdog if they don't produce events. For workflows with long-running operations, increase the `stall_timeout` in the workflow graph:
+Long-running commands in Daytona sandboxes may trigger the 1800-second stall watchdog if they don't produce events. For workflows with long-running operations, increase the `stall_timeout` in the workflow graph:
 
 ```dot
 digraph Example {
diff --git a/docs/reference/dot-language.mdx b/docs/reference/dot-language.mdx
index cebb57678..3f2c08018 100644
--- a/docs/reference/dot-language.mdx
+++ b/docs/reference/dot-language.mdx
@@ -82,7 +82,7 @@ rankdir=LR
 | `default_fidelity` | String | Default [fidelity level](/execution/context) for all nodes |
 | `default_thread` | String | Default thread ID for all nodes |
 | `max_node_visits` | Integer | Max visits per node across the run (0 = unlimited) |
-| `stall_timeout` | Duration | Timeout for stalled workflows (default: `600s`, 0 = disabled) |
+| `stall_timeout` | Duration | Timeout for stalled workflows (default: `1800s`, 0 = disabled) |
 
 ### Node defaults