diff --git a/pyproject.toml b/pyproject.toml
index 91490c2..34254b2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,9 @@ build-backend = "setuptools.build_meta"
         # fastapi is not used at the moment; uncomment once fastapi is needed again
         # "fastapi",
         # "uvicorn",
+
+        # for generate a screenshot and open the browser asynchronously
+        "nest_asyncio",
     ]
 
     keywords = ["IDAES", "energy systems", "chemical engineering", "process modeling"]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0d80ebf..d9aebf3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,9 +2,4 @@
 
 # For adding copyright headers (see addheader.yml and the readme)
 addheader >= 0.3.0
-idaes-pse @ git+https://github.com/IDAES/idaes-pse@main
-
-# For screenshot
-selenium 
-pillow 
-webdriver-manager
+idaes-pse @ git+https://github.com/IDAES/idaes-pse@main
\ No newline at end of file