diff --git a/pyproject.toml b/pyproject.toml
index 7410f10..53256ba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
 dependencies = [
-    "langchain-core>=0.1.25, <1.0.0",
+    "langchain-core>=1.0.0, <1.1.0",
     "langchain-community>=0.0.18, <1.0.0",
     "SQLAlchemy>=2.0.7, <3.0.0",
     "sqlalchemy-pytds>=1.0.0, <2.0.0",
diff --git a/requirements.txt b/requirements.txt
index bc82e8f..b2e19e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-langchain-core==0.3.15
+langchain-core==1.0.0
 langchain-community==0.3.1
 SQLAlchemy==2.0.35
 sqlalchemy-pytds==1.0.2