diff --git a/requirements.txt b/requirements.txt
index 5ba148e..c2a5921 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 selenium==3.14.0
 six==1.11.0
+attrs==17.4.0
 taskcluster==4.0.1
 https://github.com/marco-c/firefox-code-coverage/archive/cc386da20f389fd5159746d56729e149029de6ae.tar.gz#egg=firefox_code_coverage
diff --git a/test-requirements.txt b/test-requirements.txt
index f759a32..7149519 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,6 +5,6 @@ flake8-coding==1.3.0
 flake8-copyright==0.2.0
 flake8-debugger==3.1.0
 flake8-mypy==17.8.0
-pytest==3.3.0
+pytest==3.7.3
 setuptools==40.2.0
 wheel==0.31.1