diff --git a/pypi-core/README.md b/pypi-core/README.md
index b42c900..6cc24a2 100644
--- a/pypi-core/README.md
+++ b/pypi-core/README.md
@@ -1,6 +1,8 @@
 # PyPI `openplugincore`
 This is the meat of OpenPlugin, it contains all tools you need to interface with ChatGPT plugins as you do on ChatGPT Pro itself.
 
+Dependant on [`oplangchain`](https://github.com/CakeCrusher/langchain/tree/oplangchain), a derrivative of [`langchain`](https://github.com/langchain-ai/langchain), built specifically for openplugin.
+
 ## Watch out
 Issues and concerns to look out for
 - python version : `openplugincore` requires python version >= `3.10`
@@ -101,4 +103,4 @@ OpenPlugin_generation = openai.ChatCompletion.create(
 )
 
 print(json.dumps(OpenPlugin_generation, indent=2))
-```
\ No newline at end of file
+```