diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7bb145b..51e1ec0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,34 +4,81 @@
 #
 #    pip-compile requirements-dev.in
 #
-astroid==2.1.0            # via pylint
-atomicwrites==1.2.1       # via pytest
-attrs==18.2.0             # via pytest
-certifi==2018.11.29       # via requests
-chardet==3.0.4            # via requests
-coverage==4.0.3           # via pytest-cov, python-coveralls
-fancycompleter==0.8       # via pdbpp
+astroid==2.1.0
+    # via pylint
+atomicwrites==1.2.1
+    # via pytest
+attrs==18.2.0
+    # via pytest
+certifi==2018.11.29
+    # via requests
+chardet==3.0.4
+    # via requests
+coverage==4.0.3
+    # via
+    #   pytest-cov
+    #   python-coveralls
+fancycompleter==0.8
+    # via pdbpp
 flake8==3.5.0
-idna==2.8                 # via requests
+    # via -r requirements-dev.in
+idna==2.8
+    # via requests
 isort==4.3.4
-lazy-object-proxy==1.3.1  # via astroid
-mccabe==0.6.1             # via flake8, pylint
-more-itertools==5.0.0     # via pytest
+    # via
+    #   -r requirements-dev.in
+    #   pylint
+lazy-object-proxy==1.3.1
+    # via astroid
+mccabe==0.6.1
+    # via
+    #   flake8
+    #   pylint
+more-itertools==5.0.0
+    # via pytest
 pdbpp==0.9.3
-pluggy==0.8.0             # via pytest
-py==1.7.0                 # via pytest
+    # via -r requirements-dev.in
+pluggy==0.8.0
+    # via pytest
+py==1.10.0
+    # via pytest
 pycodestyle==2.3.1
-pyflakes==1.6.0           # via flake8
-pygments==2.3.1           # via pdbpp
+    # via
+    #   -r requirements-dev.in
+    #   flake8
+pyflakes==1.6.0
+    # via flake8
+pygments==2.3.1
+    # via pdbpp
 pylint==2.1.1
+    # via -r requirements-dev.in
 pytest-cov==2.5.1
+    # via -r requirements-dev.in
 pytest==3.7.4
+    # via
+    #   -r requirements-dev.in
+    #   pytest-cov
 python-coveralls==2.9.1
+    # via -r requirements-dev.in
 pyyaml==5.1
-requests==2.21.0          # via python-coveralls
+    # via
+    #   -r requirements-dev.in
+    #   python-coveralls
+requests==2.21.0
+    # via python-coveralls
 six==1.11.0
-typed-ast==1.1.1          # via astroid
+    # via
+    #   astroid
+    #   more-itertools
+    #   pytest
+    #   python-coveralls
 urllib3==1.24.3
+    # via
+    #   -r requirements-dev.in
+    #   requests
 wheel==0.32.3
-wmctrl==0.3               # via pdbpp
-wrapt==1.10.11            # via astroid
+    # via -r requirements-dev.in
+wmctrl==0.3
+    # via pdbpp
+wrapt==1.10.11
+    # via astroid