diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad73bede2c..0d716cdd8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 10.2.1 /2026-04-22
+
+## What's Changed
+
+* Pins async-substrate-interface under 2.0 to avoid complications
+
+
 ## 10.2.0 /2026-03-19
 
 ## What's Changed
diff --git a/pyproject.toml b/pyproject.toml
index dd45115f98..3c600ad6dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,11 +4,11 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "bittensor"
-version = "10.2.0"
+version = "10.2.1"
 description = "Bittensor SDK"
 readme = "README.md"
 authors = [
-    {name = "bittensor.com"}
+    { name = "bittensor.com" }
 ]
 license = { file = "LICENSE" }
 requires-python = ">=3.10,<3.15"
@@ -34,7 +34,7 @@ dependencies = [
     "uvicorn",
     "bittensor-drand>=1.3.0,<2.0.0",
     "bittensor-wallet==4.0.1",
-    "async-substrate-interface>=1.6.2"
+    "async-substrate-interface>=1.6.2,<2.0.0"
 ]
 
 [project.optional-dependencies]
@@ -95,5 +95,5 @@ classifiers = [
 ]
 
 [tool.setuptools]
-package-dir = {"bittensor" = "bittensor"}
+package-dir = { "bittensor" = "bittensor" }
 script-files = ["bittensor/utils/certifi.sh"]