diff --git a/arize_tracing/README.md b/arize_tracing/README.md
index 7686e875..97d96ba5 100644
--- a/arize_tracing/README.md
+++ b/arize_tracing/README.md
@@ -168,10 +168,7 @@ temporal workflow reset --workflow-id <workflow id> --type FirstWorkflowTask --r
 uv run verify_trace.py --workflow-id <workflow id> --expect-runs 2
 ```
 
-The reset case needs temporalio 1.36.0 or later. Earlier releases ran the
-reapplied update before reseeding the new run, so its `HandleUpdate` span
-reused the original `RunWorkflow` span's ID
-([temporalio/sdk-python#2081](https://github.com/temporalio/sdk-python/pull/2081)).
+The reset case currently needs temporalio 1.36.0 exactly (see PR #420).
 
 ![Activity retry attempts in Phoenix](phoenix-retry-attempts.png)
 
diff --git a/arize_tracing/pyproject.toml b/arize_tracing/pyproject.toml
index 56fe3fef..8ac1453c 100644
--- a/arize_tracing/pyproject.toml
+++ b/arize_tracing/pyproject.toml
@@ -3,9 +3,11 @@ name = "temporalio-samples-arize-tracing"
 version = "0.1.0"
 requires-python = ">=3.11"
 dependencies = [
-    # 1.36.0 applies workflow activation jobs as a single batch, which keeps a
-    # reset's reapplied update from reusing a span ID of the original run.
-    "temporalio[opentelemetry]>=1.36.0,<2",
+    # Pinned: 1.36.0 applies workflow activation jobs as a single batch, which
+    # keeps a reset's reapplied update from reusing a span ID of the original
+    # run. 1.36.1 (temporarily?) undoes that, so we're pinning to 1.36.0
+    # explicitly until a future release resolves this issue one way or another.
+    "temporalio[opentelemetry]==1.36.0",
     # 1.1.0 fixes span parenting when one worker runs both workflows and
     # activities; its openinference extra brings the Agents SDK instrumentation.
     "temporalio-openai-agents[openinference]>=1.1.0",
diff --git a/arize_tracing/uv.lock b/arize_tracing/uv.lock
index 51666642..61f46e72 100644
--- a/arize_tracing/uv.lock
+++ b/arize_tracing/uv.lock
@@ -4,8 +4,8 @@ requires-python = ">=3.11"
 resolution-markers = [
     "python_full_version >= '3.15'",
     "python_full_version == '3.14.*' and sys_platform == 'emscripten'",
-    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'",
     "python_full_version == '3.14.*' and sys_platform != 'emscripten'",
+    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'",
     "(python_full_version < '3.14' and sys_platform != 'emscripten') or (python_full_version < '3.12' and sys_platform == 'emscripten')",
 ]
 
@@ -1671,7 +1671,7 @@ requires-dist = [
     { name = "openinference-instrumentation-openai", specifier = ">=0.1.52" },
     { name = "openinference-semantic-conventions", specifier = ">=0.1.30" },
     { name = "opentelemetry-exporter-otlp-proto-http", specifier = ">=1.30.0,<2" },
-    { name = "temporalio", extras = ["opentelemetry"], specifier = ">=1.36.0,<2" },
+    { name = "temporalio", extras = ["opentelemetry"], specifier = "==1.36.0" },
     { name = "temporalio-openai-agents", extras = ["openinference"], specifier = ">=1.1.0" },
 ]