diff --git a/requirements.txt b/requirements.txt
index b66b32c..66c7606 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,48 +4,114 @@
 #
 #    pip-compile --output-file requirements.txt requirements.in
 #
-atomicwrites==1.3.0       # via pytest
-attrs==19.1.0             # via pytest
-autopep8==1.4.4           # via -r requirements.in
-backcall==0.1.0           # via ipython
-bleach==3.1.4             # via readme-renderer
-certifi==2019.3.9         # via requests
-chardet==3.0.4            # via requests
-coverage==4.5.3           # via coveralls, pytest-cov
-coveralls==1.7.0          # via -r requirements.in
-decorator==4.4.0          # via ipython, traitlets
-docopt==0.6.2             # via coveralls
-docutils==0.14            # via readme-renderer
-entrypoints==0.3          # via flake8
-flake8==3.7.7             # via -r requirements.in
-idna==2.8                 # via requests
-ipython-genutils==0.2.0   # via traitlets
-ipython==7.5.0            # via -r requirements.in
-jedi==0.13.3              # via ipython
-mccabe==0.6.1             # via flake8
-more-itertools==7.0.0     # via pytest
-parso==0.4.0              # via jedi
-pexpect==4.7.0            # via ipython
-pickleshare==0.7.5        # via ipython
-pkginfo==1.5.0.1          # via twine
-pluggy==0.9.0             # via pytest
-prompt-toolkit==2.0.9     # via ipython
-ptyprocess==0.6.0         # via pexpect
-py==1.8.0                 # via pytest
-pycodestyle==2.5.0        # via autopep8, flake8
-pyflakes==2.1.1           # via flake8
-pygments==2.3.1           # via ipython, readme-renderer
-pytest-cov==2.6.1         # via -r requirements.in
-pytest==4.4.1             # via -r requirements.in, pytest-cov
-readme-renderer==24.0     # via twine
-requests-mock==1.5.2      # via -r requirements.in
-requests-toolbelt==0.9.1  # via twine
-requests==2.21.0          # via -r requirements.in, coveralls, requests-mock, requests-toolbelt, twine
-six==1.12.0               # via bleach, prompt-toolkit, pytest, readme-renderer, requests-mock, traitlets
-tqdm==4.31.1              # via twine
-traitlets==4.3.2          # via ipython
-twine==1.13.0             # via -r requirements.in
-urllib3==1.24.2           # via requests
-wcwidth==0.1.7            # via prompt-toolkit
-webencodings==0.5.1       # via bleach
-wheel==0.33.1             # via -r requirements.in
+atomicwrites==1.3.0
+    # via pytest
+attrs==19.1.0
+    # via pytest
+autopep8==1.4.4
+    # via -r requirements.in
+backcall==0.1.0
+    # via ipython
+bleach==3.1.4
+    # via readme-renderer
+certifi==2019.3.9
+    # via requests
+chardet==3.0.4
+    # via requests
+coverage==4.5.3
+    # via
+    #   coveralls
+    #   pytest-cov
+coveralls==1.7.0
+    # via -r requirements.in
+decorator==4.4.0
+    # via
+    #   ipython
+    #   traitlets
+docopt==0.6.2
+    # via coveralls
+docutils==0.14
+    # via readme-renderer
+entrypoints==0.3
+    # via flake8
+flake8==3.7.7
+    # via -r requirements.in
+idna==2.8
+    # via requests
+ipython==7.16.3
+    # via -r requirements.in
+ipython-genutils==0.2.0
+    # via traitlets
+jedi==0.13.3
+    # via ipython
+mccabe==0.6.1
+    # via flake8
+more-itertools==7.0.0
+    # via pytest
+parso==0.4.0
+    # via jedi
+pexpect==4.7.0
+    # via ipython
+pickleshare==0.7.5
+    # via ipython
+pkginfo==1.5.0.1
+    # via twine
+pluggy==0.9.0
+    # via pytest
+prompt-toolkit==2.0.9
+    # via ipython
+ptyprocess==0.6.0
+    # via pexpect
+py==1.8.0
+    # via pytest
+pycodestyle==2.5.0
+    # via
+    #   autopep8
+    #   flake8
+pyflakes==2.1.1
+    # via flake8
+pygments==2.3.1
+    # via
+    #   ipython
+    #   readme-renderer
+pytest==4.4.1
+    # via
+    #   -r requirements.in
+    #   pytest-cov
+pytest-cov==2.6.1
+    # via -r requirements.in
+readme-renderer==24.0
+    # via twine
+requests==2.21.0
+    # via
+    #   -r requirements.in
+    #   coveralls
+    #   requests-mock
+    #   requests-toolbelt
+    #   twine
+requests-mock==1.5.2
+    # via -r requirements.in
+requests-toolbelt==0.9.1
+    # via twine
+six==1.12.0
+    # via
+    #   bleach
+    #   prompt-toolkit
+    #   pytest
+    #   readme-renderer
+    #   requests-mock
+    #   traitlets
+tqdm==4.31.1
+    # via twine
+traitlets==4.3.2
+    # via ipython
+twine==1.13.0
+    # via -r requirements.in
+urllib3==1.24.2
+    # via requests
+wcwidth==0.1.7
+    # via prompt-toolkit
+webencodings==0.5.1
+    # via bleach
+wheel==0.33.1
+    # via -r requirements.in