diff --git a/setup.cfg b/setup.cfg
index 12b5a020..512c2ce1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -49,6 +49,7 @@ install_requires =
     oyaml
     PyJWT>=2.0.0
     requests
+    requests-mock
     coreapi
     ape-pie
 tests_require =