diff --git a/requirements.txt b/requirements.txt
index 5444147..3212fb2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,8 +34,11 @@ stripe
 # DKIM Signed Email from Python, lot's of extras in here like async.
 # https://git.launchpad.net/dkimpy/tree/setup.py#n84
 dkimpy
+
 # needed for signing with ed25519 keys.
 dkimpy[ed25519]
+# that line above didn't seem to pull pynacl in. 
+pynacl
 
 # MarkDown is a popular and familair WYSIWYM markup language.
 # python 3.