diff --git a/pyproject.toml b/pyproject.toml
index 4f42422..bee8709 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,7 +73,7 @@ dependencies = [
     "psutil>=7.2.1",
     "httpx>=0.28.1",
     "pytest-asyncio>=1.3.0",
-    "pyasn1==0.6.2",
+    "pyasn1==0.6.3",
     "jupyter>=1.1.1",
     # Workflow orchestration
     "prefect>=3.1.0",  # Latest: 3.1.11 (2026), Lightweight workflow orchestration for OHLCV jobs