diff --git a/python/ray/__init__.py b/python/ray/__init__.py
index 42dc2e806..2dceb6006 100644
--- a/python/ray/__init__.py
+++ b/python/ray/__init__.py
@@ -129,7 +129,7 @@ from ray.actor import method  # noqa: E402
 from ray.runtime_context import _get_runtime_context  # noqa: E402
 
 # Ray version string.
-__version__ = "0.9.0.dev0"
+__version__ = "0.8.1"
 
 __all__ = [
     "jobs",
diff --git a/src/ray/raylet/main.cc b/src/ray/raylet/main.cc
index 82912b59d..887193402 100644
--- a/src/ray/raylet/main.cc
+++ b/src/ray/raylet/main.cc
@@ -64,7 +64,7 @@ int main(int argc, char *argv[]) {
   // Initialize stats.
   const ray::stats::TagsType global_tags = {
       {ray::stats::JobNameKey, "raylet"},
-      {ray::stats::VersionKey, "0.9.0.dev0"},
+      {ray::stats::VersionKey, "0.8.1"},
       {ray::stats::NodeAddressKey, node_ip_address}};
   ray::stats::Init(stat_address, global_tags, disable_stats, enable_stdout_exporter);