diff --git a/pyproject.toml b/pyproject.toml
index 2a5eb6f5ff..815b21008d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,13 +53,13 @@ dependencies = [
     "uvicorn>=0.34.0",
 
     # Agents
-    "langchain>=0.3.27",
-    "langchain-chroma>=0.2.5",
-    "langchain-core>=0.3.72",
-    "langchain-openai>=0.3.28",
-    "langchain-text-splitters>=0.3.9",
-    "langchain-huggingface>=0.3.1",
-    "langchain-ollama>=0.3.10",
+    "langchain>=0.3.27,<1",
+    "langchain-chroma>=0.2.6,<1",
+    "langchain-core>=0.3.79,<1",
+    "langchain-openai>=0.3.33,<1",
+    "langchain-text-splitters>=0.3.11,<1",
+    "langchain-huggingface>=0.3.1,<1",
+    "langchain-ollama>=0.3.10,<1",
     "bitsandbytes>=0.48.2,<1.0",
     "ollama>=0.6.0",