diff --git a/dev-requirements.txt b/dev-requirements.txt
index 810c57d..dd157c0 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -4,33 +4,69 @@
 #
 #    pip-compile dev-requirements.in
 #
-appnope==0.1.0            # via ipython
-atomicwrites==1.3.0       # via pytest
-attrs==19.3.0             # via pytest
-backcall==0.1.0           # via ipython
-click==7.0                # via pip-tools
-decorator==4.4.1          # via ipython, traitlets
-importlib-metadata==0.23  # via pluggy, pytest
-ipython-genutils==0.2.0   # via traitlets
-ipython==7.9.0            # via -r dev-requirements.in
-jedi==0.15.1              # via ipython
-more-itertools==7.2.0     # via pytest
-packaging==19.2           # via pytest
-parso==0.5.1              # via jedi
-pexpect==4.7.0            # via ipython
-pickleshare==0.7.5        # via ipython
-pip-tools==4.2.0          # via -r dev-requirements.in
-pluggy==0.13.0            # via pytest
-prompt-toolkit==2.0.10    # via ipython
-ptyprocess==0.6.0         # via pexpect
-py==1.8.0                 # via pytest
-pygments==2.4.2           # via ipython
-pyparsing==2.4.5          # via packaging
-pytest==5.2.2             # via -r dev-requirements.in
-six==1.12.0               # via -c requirements.txt, packaging, pip-tools, prompt-toolkit, traitlets
-traitlets==4.3.3          # via ipython
-wcwidth==0.1.7            # via prompt-toolkit, pytest
-zipp==0.6.0               # via importlib-metadata
+atomicwrites==1.3.0
+    # via pytest
+attrs==19.3.0
+    # via pytest
+backcall==0.1.0
+    # via ipython
+click==7.0
+    # via pip-tools
+decorator==4.4.1
+    # via
+    #   ipython
+    #   traitlets
+importlib-metadata==0.23
+    # via
+    #   pluggy
+    #   pytest
+ipython-genutils==0.2.0
+    # via traitlets
+ipython==7.9.0
+    # via -r dev-requirements.in
+jedi==0.15.1
+    # via ipython
+more-itertools==7.2.0
+    # via pytest
+packaging==19.2
+    # via pytest
+parso==0.5.1
+    # via jedi
+pexpect==4.7.0
+    # via ipython
+pickleshare==0.7.5
+    # via ipython
+pip-tools==4.2.0
+    # via -r dev-requirements.in
+pluggy==0.13.0
+    # via pytest
+prompt-toolkit==2.0.10
+    # via ipython
+ptyprocess==0.6.0
+    # via pexpect
+py==1.10.0
+    # via pytest
+pygments==2.4.2
+    # via ipython
+pyparsing==2.4.5
+    # via packaging
+pytest==5.2.2
+    # via -r dev-requirements.in
+six==1.12.0
+    # via
+    #   -c requirements.txt
+    #   packaging
+    #   pip-tools
+    #   prompt-toolkit
+    #   traitlets
+traitlets==4.3.3
+    # via ipython
+wcwidth==0.1.7
+    # via
+    #   prompt-toolkit
+    #   pytest
+zipp==0.6.0
+    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools