diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 1c3e71b1..704bf0be 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -28,13 +28,13 @@ dependencies = [
     "langgraph>=0.3,<0.4",
     "pgvector>=0.4.1",
     "dashscope>=1.14.0,<2.0.0",
-    "pymysql (>=1.1.1,<2.0.0)",
+    "pymysql (>=1.2.0,<2.0.0)",
     "cryptography (>=44.0.3,<45.0.0)",
     "llama_index>=0.12.35",
-    "pymssql (>=2.3.4,<3.0.0)",
+    "pymssql (>=2.3.13,<3.0.0)",
     "pandas (>=2.2.3,<3.0.0)",
     "openpyxl (>=3.1.5,<4.0.0)",
-    "psycopg2-binary (>=2.9.10,<3.0.0)",
+    "psycopg2-binary (>=2.9.12,<3.0.0)",
     "oracledb (>=3.1.1,<4.0.0)",
     "pyyaml (>=6.0.2,<7.0.0)",
     "fastapi-mcp (>=0.3.4,<0.4.0)",