diff --git a/requirements-dev.txt b/requirements-dev.txt
index 232a07a..db5ac68 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,15 +5,29 @@
 #    pip-compile --output-file requirements-dev.txt requirements-dev.in
 #
 autopep8==1.3.2
-configparser==3.5.0       # via flake8
-coverage==4.4.1           # via pytest-cov
-enum34==1.1.6             # via flake8
+    # via -r requirements-dev.in
+coverage==4.4.1
+    # via pytest-cov
 flake8==3.3.0
+    # via -r requirements-dev.in
 isort==4.2.15
-mccabe==0.6.1             # via flake8
-py==1.4.34                # via pytest
-pycodestyle==2.3.1        # via autopep8, flake8
-pyflakes==1.5.0           # via flake8
+    # via -r requirements-dev.in
+mccabe==0.6.1
+    # via flake8
+py==1.10.0
+    # via pytest
+pycodestyle==2.3.1
+    # via
+    #   autopep8
+    #   flake8
+pyflakes==1.5.0
+    # via flake8
+pytest==3.1.2
+    # via
+    #   -r requirements-dev.in
+    #   pytest-cov
+    #   pytest-django
 pytest-cov==2.5.1
+    # via -r requirements-dev.in
 pytest-django==3.1.2
-pytest==3.1.2
+    # via -r requirements-dev.in