diff --git a/pyproject.toml b/pyproject.toml
index 7704d7e..42742e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
     "pynacl>=1.5.0",
     "requests>=2.31.0",
     "httpx>=0.27.0",
-    "aptos-sdk>=0.9.0",
+    "aptos-sdk>=0.11.0,<0.12.0",
     "pydantic>=2.0",
     "cryptography>=41.0",
 ]
diff --git a/requirements.txt b/requirements.txt
index 6cd22fa..247bd5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 pynacl>=1.5.0
 requests>=2.31.0
 httpx>=0.27.0
-aptos-sdk>=0.9.0
+aptos-sdk>=0.11.0,<0.12.0
 pydantic>=2.0
 cryptography>=41.0