diff --git a/pyproject.toml b/pyproject.toml
index 4ff6ef97d..00ebff0dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ dependencies = [
   "beautifulsoup4",
   "sphinx >= 4.0,<6.0",
   "sphinx-basic-ng",
-  "pygments",
+  "pygments >= 2.7",
 ]
 
 license = { file = "LICENSE"}