diff --git a/requirements/conda.txt b/requirements/conda.txt
index 5f5e4bb..f3e0cad 100644
--- a/requirements/conda.txt
+++ b/requirements/conda.txt
@@ -20,7 +20,7 @@
 # https://pypi.org/project/ujson/
 # UltraJSON is an ultra fast JSON encoder and decoder written
 # in pure C with bindings for Python 2.5+ and 3.
-ujson
+# ujson
 
 # The hot new pkdf on the block is argon2, winner of
 # the https://password-hashing.net/ competition.
diff --git a/requirements/vendor.txt b/requirements/vendor.txt
index 985e534..56ad1a1 100644
--- a/requirements/vendor.txt
+++ b/requirements/vendor.txt
@@ -15,8 +15,9 @@
 #
 # This allows us to:
 #
-# 1. Easily navigate to the source of a vendored dependency
-# 2. Use binary versions packages instead of source versions of
+# 1. Enable mypy to check modules of multiple packages.
+# 2. Easily navigate to the source of a vendored dependency
+# 3. Use binary versions packages instead of source versions of
 #    packages, simply by not including the vendor/ directory in
 #    the PYTHONPATH. The version from the virtualenv will then
 #    be loaded instead.