diff --git a/pyproject.toml b/pyproject.toml
index 5796ac9c..422cd8de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,6 +42,8 @@ flake8 = "^5.0.4"
 black = {version = "^21.5-beta.1", python = "^3.7"}
 mkdocs = "^1.2.1"
 mkdocs-material = "^8.1.4"
+pillow = {version = "^9.3.0", python = "^3.7"}
+cairosvg = {version = "^2.5.2", python = "^3.7"}
 mdx-include = "^1.4.1"
 coverage = {extras = ["toml"], version = "^6.2"}
 fastapi = "^0.68.1"