diff --git a/dev-requirements.txt b/dev-requirements.txt
index 3834898..40e7aae 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -4,9 +4,15 @@
 #
 #    pip-compile --output-file dev-requirements.txt dev-requirements.in
 #
-click==6.7                # via pip-tools
-first==2.0.1              # via pip-tools
+click==6.7
+    # via pip-tools
+first==2.0.1
+    # via pip-tools
 pip-tools==1.9.0
-py==1.4.33                # via pytest
+    # via -r dev-requirements.in
+py==1.10.0
+    # via pytest
 pytest==3.0.7
-six==1.10.0               # via pip-tools
+    # via -r dev-requirements.in
+six==1.10.0
+    # via pip-tools