diff --git a/README.md b/README.md
index 04219f9..7f411a2 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,15 @@ You only need to supply a few things.
 
 In `settings()` function, supply:
 
-* Search: Select the search tool you want to use (e.g., GoogleSearchAPIWrapper).
+* Search: Select the search tool you want to use (e.g., GoogleSearchAPIWrapper). 
 * Vectorstore: Select the vectorstore and embeddings you want to use (e.g., Chroma, OpenAIEmbeddings).
 * Select the LLM you want to use (e.g., ChatOpenAI).
 
-Ensure that the API keys required for your tools of interest are specified.
+Set all API keys, e.g.:
+
+export GOOGLE_API_KEY=xxx
+export GOOGLE_CSE_ID=xxx
+export OPENAI_API_KEY=xxx
 
 Run:
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..94b70a1
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,10 @@
+streamlit==1.25.0
+langchain==0.0.243
+chromadb==0.4.2
+openai==0.27.8
+google-api-core==2.11.1
+google-api-python-client==2.70.0
+google-auth==2.20.0
+google-auth-httplib2==0.1.0
+google-search-results==2.4.2
+googleapis-common-protos==1.59.1
\ No newline at end of file
diff --git a/web_explorer.py b/web_explorer.py
index d3d51fb..6345e71 100644
--- a/web_explorer.py
+++ b/web_explorer.py
@@ -17,8 +17,6 @@ def settings():
 
     # Search
     from langchain.utilities import GoogleSearchAPIWrapper
-    os.environ["GOOGLE_CSE_ID"] = "xxx"
-    os.environ["GOOGLE_API_KEY"] = "xxx"
     search = GoogleSearchAPIWrapper()   
 
     # Initialize