diff --git a/requirements.txt b/requirements.txt
index 317b745..57f6f6c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,6 +25,8 @@ babel==2.9.1
     # via jupyterlab-server
 backcall==0.2.0
     # via ipython
+beautifulsoup4==4.11.1
+    # via nbconvert
 bleach==4.1.0
     # via nbconvert
 cattrs==1.10.0
@@ -114,8 +116,12 @@ jupyterlab-server==2.10.3
     # via jupyterlab
 jupyterlab-widgets==1.0.2
     # via ipywidgets
+lxml==4.9.1
+    # via nbconvert
 markupsafe==2.1.0
-    # via jinja2
+    # via
+    #   jinja2
+    #   nbconvert
 matplotlib-inline==0.1.3
     # via
     #   ipykernel
@@ -126,7 +132,7 @@ nbclassic==0.3.6
     # via jupyterlab
 nbclient==0.5.12
     # via nbconvert
-nbconvert==6.4.2
+nbconvert==6.5.1
     # via
     #   jupyter-server
     #   notebook
@@ -157,6 +163,7 @@ packaging==21.3
     #   jupyter-server
     #   jupyterlab
     #   jupyterlab-server
+    #   nbconvert
 pandas==1.4.1
     # via -r requirements.in
 pandocfilters==1.5.0
@@ -224,13 +231,15 @@ six==1.16.0
     #   url-normalize
 sniffio==1.2.0
     # via anyio
+soupsieve==2.3.2.post1
+    # via beautifulsoup4
 stack-data==0.2.0
     # via ipython
 terminado==0.13.3
     # via
     #   jupyter-server
     #   notebook
-testpath==0.6.0
+tinycss2==1.1.1
     # via nbconvert
 tornado==6.1
     # via
@@ -264,7 +273,9 @@ urllib3==1.26.8
 wcwidth==0.2.5
     # via prompt-toolkit
 webencodings==0.5.1
-    # via bleach
+    # via
+    #   bleach
+    #   tinycss2
 websocket-client==1.3.1
     # via jupyter-server
 widgetsnbextension==3.5.2