diff --git a/pyproject.toml b/pyproject.toml
index 733fbcc..24da605 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
     "requests>=2.31",      # Binance REST client
     "joblib>=1.3",         # Caching / parallelism helpers
     "pandas-market-calendars>=5.4,<6",  # Maintained XNYS calendar
-    "filelock>=3.13",      # Cross-process cache-write coordination
+    "filelock>=3.32.2",      # Cross-process cache-write coordination
 ]
 
 [project.optional-dependencies]
diff --git a/requirements.txt b/requirements.txt
index 3f34650..a7feb33 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ typer>=0.12
 requests>=2.31
 joblib>=1.3
 pandas-market-calendars>=5.4,<6
-filelock>=3.13
+filelock>=3.32.2
 
 # Data source (optional but needed for `quantlab download` from Yahoo)
 yfinance>=0.2.40