diff --git a/docs/index.rst b/docs/index.rst
index 01d6bb7..1c3a532 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -13,6 +13,18 @@ need to install or upgrade versions of dependencies to work with hats-import.
 
     pip install hats-import
 
+.. tip::
+    Installing optional dependencies
+
+    There are some extra dependencies that can make running hats-import in a jupyter
+    environment easier, or connecting to a variety of remote file systems.
+
+    These can be installed with the ``full`` extra.
+
+    .. code-block:: console
+
+        >> pip install hats-import[full]
+
 .. tip::
     Installing on Mac
 
@@ -26,6 +38,8 @@ need to install or upgrade versions of dependencies to work with hats-import.
         >> conda config --append channels conda-forge
         >> conda install healpy
 
+
+
 Setting up a pipeline
 -------------------------------------------------------------------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index 0744e54..0e0f589 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,13 +17,10 @@ dynamic = ["version"]
 dependencies = [
     "dask[complete]>=2024.3.0", # Includes dask expressions.
     "deprecated",
-    "hats >=0.4",
-    "ipykernel", # Support for Jupyter notebooks
+    "hats >=0.4.2",
     "numpy",
     "pandas",
     "pyarrow",
-    "pyyaml",
-    "scipy",
     "tqdm",
     "universal_pathlib",
 ]
@@ -41,7 +38,11 @@ dev = [
     "pytest-cov",
     "pytest-timeout",
     "ray", # Used for dask-on-ray testing.
-    "types-PyYAML", # type stubs for pyyaml
+]
+full = [
+    "fsspec[full]", # complete file system specs.
+    "ipykernel", # Support for Jupyter notebooks
+    "ipywidgets", # useful for tqdm in notebooks.
 ]
 
 [build-system]