diff --git a/app.yaml b/app.yaml
index f2e9fae..d1c5adb 100644
--- a/app.yaml
+++ b/app.yaml
@@ -12,6 +12,8 @@ builtins:
 libraries:
 - name: lxml
   version: latest
+- name: pycrypto
+  version: latest
 - name: ssl
   version: latest
 - name: webob
diff --git a/common.py b/common.py
index d009713..53f1222 100644
--- a/common.py
+++ b/common.py
@@ -8,7 +8,7 @@ from webob import exc
 
 
 HEADERS = {
-    'User-Agent': 'bridgy-federated (https://fed.brid.gy/)',
+    'User-Agent': 'Bridgy Fed (https://fed.brid.gy/)',
 }
 
 
diff --git a/requirements.txt b/requirements.txt
index b775dd4..3229db7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,10 @@
+-e git+https://github.com/snarfed/django-salmon.git#egg=django_salmon
+-e git+https://github.com/snarfed/webmention-tools.git#egg=webmentiontools
 granary
 mf2py>=1.0.4
 mf2util>=0.5.0
 mock
+pycrypto
 requests==2.10.0
 requests-toolbelt==0.6.2
--e git+https://github.com/snarfed/webmention-tools.git#egg=webmentiontools
 urllib3>=1.14