diff --git a/README.md b/README.md
index b0badfab..651a0459 100644
--- a/README.md
+++ b/README.md
@@ -65,10 +65,10 @@ verification, pinning and how releases are cut.
 
 Prerequisites: a cluster with [Agent Substrate](https://github.com/agent-substrate/substrate)
 installed and a snapshots bucket. ate-env is built against Substrate
-[`f03327bd`](https://github.com/agent-substrate/substrate/commit/f03327bd) (2026-10-12) and needs at
-least that revision on the cluster: the WorkerPool it writes declares `spec.sandboxClasses`, the
-ActorTemplate uses `snapshotConfig` and `wakeupProbe`, and `--worker-image` must be the `ateom` image
-published by that Substrate install.
+[`da35a983`](https://github.com/agent-substrate/substrate/commit/da35a983) (2026-10-13). The cluster
+needs a Substrate recent enough to accept what ate-env writes: the WorkerPool declares
+`spec.sandboxClasses`, the ActorTemplate uses `snapshotConfig` and `wakeupProbe`, and `--worker-image`
+must be the `ateom` image published by that Substrate install.
 
 ### 1. Deploy the Kubernetes Resources
 
diff --git a/cmd/ate-env/manifest.go b/cmd/ate-env/manifest.go
index c80c1f3b..2238a370 100644
--- a/cmd/ate-env/manifest.go
+++ b/cmd/ate-env/manifest.go
@@ -404,7 +404,7 @@ func buildActorTemplate(cfg templateConfig) *ateapipb.ActorTemplate {
 				Value: "80",
 			}},
 			WakeupProbe: &ateapipb.ContainerWakeupProbe{
-				HttpGet: &ateapipb.HTTPGetAction{
+				HttpGet: &ateapipb.HttpGetAction{
 					Path: "/readyz",
 					Port: 80,
 				},
diff --git a/go.mod b/go.mod
index 538b82df..fba5ba90 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/agent-substrate/env
 go 1.27.0
 
 require (
-	github.com/agent-substrate/substrate v0.4.1-0.20261013000135-f03327bd4aa8
+	github.com/agent-substrate/substrate v0.4.1-0.20261013175625-da35a983ed34
 	github.com/google/uuid v1.6.0
 	github.com/modelcontextprotocol/go-sdk v1.4.1
 	github.com/spf13/cobra v1.10.2
diff --git a/go.sum b/go.sum
index 2ed97c86..974facc8 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 github.com/Masterminds/semver/v3 v3.4.0 h1:Zog+i5UMtVoCU8oKka5P7i9q9HgrJeGzI9SA1Xbatp0=
 github.com/Masterminds/semver/v3 v3.4.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
-github.com/agent-substrate/substrate v0.4.1-0.20261013000135-f03327bd4aa8 h1:sQlP0nA5TBcNpQqHkwghJXUHN0tgNOx0tg8Zmh71U38=
-github.com/agent-substrate/substrate v0.4.1-0.20261013000135-f03327bd4aa8/go.mod h1:XVQwhYEmOlb+ILs9BvSCHXYhgo2F6/N2qN4DmRwogQI=
+github.com/agent-substrate/substrate v0.4.1-0.20261013175625-da35a983ed34 h1:pGiVJjwYbQMDJQj6le/4izVcIz0tHO1i2jQJ8EyKpCU=
+github.com/agent-substrate/substrate v0.4.1-0.20261013175625-da35a983ed34/go.mod h1:XVQwhYEmOlb+ILs9BvSCHXYhgo2F6/N2qN4DmRwogQI=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
diff --git a/internal/apiservice/imagetemplate_test.go b/internal/apiservice/imagetemplate_test.go
index a6dba482..8da88ee0 100644
--- a/internal/apiservice/imagetemplate_test.go
+++ b/internal/apiservice/imagetemplate_test.go
@@ -36,7 +36,7 @@ func modeABase() *ateapipb.ActorTemplate {
 			Image:       testGuestImage,
 			Command:     []string{"/ko-app/ate-env-guest", "-workspace", "/workspace"},
 			Env:         []*ateapipb.EnvVar{{Name: "PORT", Value: "80"}},
-			WakeupProbe: &ateapipb.ContainerWakeupProbe{HttpGet: &ateapipb.HTTPGetAction{Path: "/readyz", Port: 80}},
+			WakeupProbe: &ateapipb.ContainerWakeupProbe{HttpGet: &ateapipb.HttpGetAction{Path: "/readyz", Port: 80}},
 		}},
 		SnapshotConfig: &ateapipb.SnapshotConfig{StorageLocation: "gs://b/p/", PreferredFidelity: ateapipb.SnapshotFidelity_SNAPSHOT_FIDELITY_MEMORY},
 		SandboxConfig:  &ateapipb.SandboxConfig{SandboxClass: ateapipb.SandboxClass_SANDBOX_CLASS_GVISOR, ConfigName: "gvisor-default"},
diff --git a/internal/apiservice/server_test.go b/internal/apiservice/server_test.go
index 5ee1d5fd..3b698921 100644
--- a/internal/apiservice/server_test.go
+++ b/internal/apiservice/server_test.go
@@ -596,7 +596,7 @@ func seedGuestTemplate(control *fakecontrol.Server, atespace, name string) {
 			Image:       testGuestImage,
 			Command:     []string{"/ko-app/ate-env-guest"},
 			Env:         []*ateapipb.EnvVar{{Name: "PORT", Value: "80"}},
-			WakeupProbe: &ateapipb.ContainerWakeupProbe{HttpGet: &ateapipb.HTTPGetAction{Path: "/readyz", Port: 80}},
+			WakeupProbe: &ateapipb.ContainerWakeupProbe{HttpGet: &ateapipb.HttpGetAction{Path: "/readyz", Port: 80}},
 		}},
 		SnapshotConfig: &ateapipb.SnapshotConfig{StorageLocation: "gs://bucket/ate-env/"},
 		SandboxConfig:  &ateapipb.SandboxConfig{SandboxClass: ateapipb.SandboxClass_SANDBOX_CLASS_GVISOR, ConfigName: "gvisor-default"},