diff --git a/requirements.txt b/requirements.txt
index 3e11815..6d518d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,9 +4,11 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.in
 #
+argon2-cffi==20.1.0       # via notebook
 attrs==19.1.0             # via jsonschema
 backcall==0.1.0           # via ipython
 bleach==3.1.2             # via nbconvert
+cffi==1.14.3              # via argon2-cffi
 decorator==4.4.0          # via ipython, traitlets
 defusedxml==0.6.0         # via nbconvert
 entrypoints==0.3          # via nbconvert
@@ -17,15 +19,15 @@ ipywidgets==7.5.0         # via jupyter
 jedi==0.14.1              # via ipython
 jinja2==2.10.1            # via nbconvert, notebook
 jsonschema==3.0.1         # via nbformat
-jupyter-client==5.3.1     # via ipykernel, jupyter-console, notebook, qtconsole
+jupyter-client==6.1.7     # via ipykernel, jupyter-console, notebook, qtconsole
 jupyter-console==6.0.0    # via jupyter
-jupyter-core==4.5.0       # via jupyter-client, nbconvert, nbformat, notebook, qtconsole
+jupyter-core==4.7.0       # via jupyter-client, nbconvert, nbformat, notebook, qtconsole
 jupyter==1.0.0            # via -r requirements.in
 markupsafe==1.1.1         # via jinja2
 mistune==0.8.4            # via nbconvert
 nbconvert==5.5.0          # via jupyter, notebook
 nbformat==4.4.0           # via ipywidgets, nbconvert, notebook
-notebook==6.0.0           # via jupyter, widgetsnbextension
+notebook==6.1.5           # via jupyter, widgetsnbextension
 pandocfilters==1.4.2      # via nbconvert
 parso==0.5.1              # via jedi
 pexpect==4.7.0            # via ipython
@@ -33,14 +35,15 @@ pickleshare==0.7.5        # via ipython
 prometheus-client==0.7.1  # via notebook
 prompt-toolkit==2.0.9     # via ipython, jupyter-console
 ptyprocess==0.6.0         # via pexpect, terminado
+pycparser==2.20           # via cffi
 pygments==2.4.2           # via ipython, jupyter-console, nbconvert, qtconsole
 pyrsistent==0.15.3        # via jsonschema
 python-dateutil==2.8.0    # via jupyter-client
 pyzmq==18.0.2             # via jupyter-client, notebook
 qtconsole==4.5.2          # via jupyter
 send2trash==1.5.0         # via notebook
-six==1.12.0               # via bleach, jsonschema, prompt-toolkit, python-dateutil, traitlets
-terminado==0.8.2          # via notebook
+six==1.12.0               # via argon2-cffi, bleach, jsonschema, prompt-toolkit, python-dateutil, traitlets
+terminado==0.9.1          # via notebook
 testpath==0.4.2           # via nbconvert
 tornado==6.0.3            # via ipykernel, jupyter-client, notebook, terminado
 traitlets==4.3.2          # via ipykernel, ipython, ipywidgets, jupyter-client, jupyter-core, nbconvert, nbformat, notebook, qtconsole