diff --git a/docs/docs/how_to/chat_models_universal_init.ipynb b/docs/docs/how_to/chat_models_universal_init.ipynb
index 7c304b498a4..d6d005fe67f 100644
--- a/docs/docs/how_to/chat_models_universal_init.ipynb
+++ b/docs/docs/how_to/chat_models_universal_init.ipynb
@@ -15,6 +15,12 @@
     "\n",
     "Make sure you have the integration packages installed for any model providers you want to support. E.g. you should have `langchain-openai` installed to init an OpenAI model.\n",
     "\n",
+    ":::\n",
+    "\n",
+    ":::info Requires ``langchain >= 0.2.8``\n",
+    "\n",
+    "This functionality was added in ``langchain-core == 0.2.8``. Please make sure your package is up to date.\n",
+    "\n",
     ":::"
    ]
   },
@@ -25,7 +31,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%pip install -qU langchain>=0.2.7 langchain-openai langchain-anthropic langchain-google-vertexai"
+    "%pip install -qU langchain>=0.2.8 langchain-openai langchain-anthropic langchain-google-vertexai"
    ]
   },
   {
diff --git a/libs/langchain/langchain/chat_models/base.py b/libs/langchain/langchain/chat_models/base.py
index ca9a83d876d..b838576e6ca 100644
--- a/libs/langchain/langchain/chat_models/base.py
+++ b/libs/langchain/langchain/chat_models/base.py
@@ -98,6 +98,10 @@ def init_chat_model(
 
     Must have the integration package corresponding to the model provider installed.
 
+    .. versionadded:: 0.2.7
+
+    .. versionchanged:: 0.2.8
+
     Args:
         model: The name of the model, e.g. "gpt-4o", "claude-3-opus-20240229".
         model_provider: The model provider. Supported model_provider values and the