diff --git a/temporalio/Cargo.lock b/temporalio/Cargo.lock
index 15af77c6..4f6c39ce 100644
--- a/temporalio/Cargo.lock
+++ b/temporalio/Cargo.lock
@@ -3239,6 +3239,7 @@ dependencies = [
  "anyhow",
  "assert_matches",
  "async-trait",
+ "backoff",
  "bimap",
  "bon",
  "bytes",
diff --git a/temporalio/ext/sdk-core b/temporalio/ext/sdk-core
index 9dedad11..12c656f7 160000
--- a/temporalio/ext/sdk-core
+++ b/temporalio/ext/sdk-core
@@ -1 +1 @@
-Subproject commit 9dedad1115ab64a0ffb8decf3ad3f338979dea9f
+Subproject commit 12c656f7b2dce2a139bb3f1b4873c7007a751380