diff --git a/derivative/utils.py b/derivative/utils.py
index 707f866..9b2e3e8 100644
--- a/derivative/utils.py
+++ b/derivative/utils.py
@@ -5,10 +5,11 @@
 import numpy as np
 from scipy.special import binom
 
-if sys.version_info < (3, 10):
-    from importlib_metadata import entry_points
-else:
+try:
     from importlib.metadata import entry_points
+except ImportError:
+    # if sys.version_info < (3, 10):
+    from importlib_metadata import entry_points
 
 hyperparam_algorithms = entry_points(group="derivative.hyperparam_opt")
 
diff --git a/pyproject.toml b/pyproject.toml
index 238ebce..5e8e4f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "derivative"
-version = "0.6.1"
+version = "0.6.2"
 description = "Numerical differentiation in python."
 repository = "https://github.com/andgoldschmidt/derivative"
 documentation = "https://derivative.readthedocs.io/"
@@ -20,6 +20,9 @@ numpy = "^1.18.3"
 scipy = "^1.4.1"
 scikit-learn = "^1"
 
+# third-party access to the functionality of importlib.metadata
+importlib-metadata = "^7.1.0"
+
 # docs
 sphinx = {version = "^5", optional = true}
 nbsphinx = {version = "^0.6.1", optional = true}
@@ -32,12 +35,12 @@ matplotlib = {version = "^3.2.1", optional = true}
 pytest = {version = "^7", optional = true}
 
 [tool.poetry.extras]
-docs = ["sphinx", "nbsphinx", "ipykernel", "jupyter_client", "matplotlib", "pandoc"]
+docs = ["sphinx", "nbsphinx", "ipykernel", "jupyter_client", "matplotlib"]
 dev = ["pytest"]
 
 [build-system]
 requires = ["poetry-core>=1.1.0"]
 build-backend = "poetry.core.masonry.api"
 
-[tool.poetry.plugins.'derivative.hyperparam_opt']
+[tool.poetry.plugins."derivative.hyperparam_opt"]
 "kalman.default" = "derivative.utils:_default_kalman"