diff --git a/pyproject.toml b/pyproject.toml
index f4436d1..640ca35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,13 @@ classifiers = [
     "Operating System :: Linux",
 ]
 
+dependencies = [
+  "Pygments>=2.14.0",
+  "panflute>=2.3.0",
+  "fontTools>=4.38.0",
+  "Pillow>=9.4.0",
+]
+
 [project.urls]
 "Homepage" = "https://gitea.ks.matfyz.cz/KSP/formatitko"
 "Bug Tracker" = "https://gitea.ks.matfyz.cz/KSP/formatitko/issues"