diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -47,13 +47,13 @@ requirements = [
     "FormEncode >= 1.2.4, < 1.4",
     "SQLAlchemy >= 1.1, < 1.3",
     "Mako >= 0.9.0, < 1.1",
-    "Pygments >= 1.5, < 2.3",
+    "Pygments >= 2.0, < 2.3",
     "Whoosh >= 2.5.0, < 2.8",
     "celery >= 3.1, < 4.0", # celery 4 doesn't work
-    "Babel >= 0.9.6, < 2.7",
+    "Babel >= 1.3, < 2.7",
     "python-dateutil >= 1.5.0, < 2.8",
     "Markdown >= 2.2.1, < 2.7",
-    "docutils >= 0.8.1, < 0.15",
+    "docutils >= 0.11, < 0.15",
     "URLObject >= 2.3.4, < 2.5",
     "Routes >= 1.13, < 2",
     "dulwich >= 0.14.1, < 0.20",