diff --git a/pyproject.toml b/pyproject.toml
index f0c93d55..166b73f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ readme = "README.md"
 version = "0.11.0"
 
 [tool.poetry.dependencies]
+# For certifi, use ">=" instead of "^" since it upgrades its "major version" every year
 certifi = ">=2022.12.07"
 frozendict = "^2.3.2"
 pillow = "^9.0.0" # TODO: We may want to mark pillow (and numpy) as extra (https://python-poetry.org/docs/master/pyproject#extras)