diff --git a/environment.yml b/environment.yml
index cb2666c..0a1930d 100644
--- a/environment.yml
+++ b/environment.yml
@@ -32,5 +32,6 @@ dependencies:
   - twine
   - pip
   - pip:
+      - python-dotenv
       - sphinx-material
       - celerite2
diff --git a/pyproject.toml b/pyproject.toml
index 3123495..85c1f66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ dependencies = [
     "tqdm",
     "pandas",
     "bokeh",
+    "python-dotenv",
 ]
 classifiers = [
     "Programming Language :: Python :: 3",
diff --git a/requirements.txt b/requirements.txt
index be52cac..856cff8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,4 +26,5 @@ tox
 coverage
 coveralls
 twine
-pip
\ No newline at end of file
+pip
+python-dotenv
\ No newline at end of file