diff --git a/pyproject.toml b/pyproject.toml
index c4fe41609..6e3256718 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ scipy = ">=1.5"
 matplotlib = ">=3.5"
 tqdm = ">=4.31"
 natsort = "^8.1.0"
-psutil = ""
+psutil = ">=5.9"
 fooof = ">=1.0"
 esi-acme = "2022.7"
 ipdb = "^0.13.9"
@@ -41,7 +41,7 @@ black = "^22.6.0"
 pytest = "^7.0"
 ipython = "^8.0"
 pytest-cov = "^3.0.0"
-sphinx-bootstrap-theme = ""
+sphinx-bootstrap-theme = ">=0.8"
 sphinx-automodapi = "^0.14.1"
 flake8 = "^3.9"