diff --git a/requirements.txt b/requirements.txt
index 7463cad..daa4ee6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,9 @@ attrs==20.3.0
 backcall==0.2.0
     # via ipython
 beautifulsoup4==4.9.3
-    # via pelican-summary
+    # via
+    #   nbconvert
+    #   pelican-summary
 bleach==3.3.0
     # via nbconvert
 blinker==1.4
@@ -38,7 +40,7 @@ ipython-genutils==0.2.0
     #   traitlets
 jedi==0.18.0
     # via ipython
-jinja2==2.11.3
+jinja2==3.1.2
     # via
     #   nbconvert
     #   pelican
@@ -53,19 +55,23 @@ jupyter-core==4.7.0
     #   nbformat
 jupyterlab-pygments==0.1.2
     # via nbconvert
+lxml==4.9.1
+    # via nbconvert
 markdown==3.3.3
     # via
     #   -r requirements.in
     #   pelican-jupyter
-markupsafe==1.1.1
-    # via jinja2
+markupsafe==2.1.1
+    # via
+    #   jinja2
+    #   nbconvert
 matplotlib-inline==0.1.3
     # via ipython
 mistune==0.8.4
     # via nbconvert
 nbclient==0.5.1
     # via nbconvert
-nbconvert==6.3.0
+nbconvert==6.5.1
     # via
     #   -r requirements.in
     #   pelican-jupyter
@@ -77,7 +83,9 @@ nbformat==5.1.3
 nest-asyncio==1.4.3
     # via nbclient
 packaging==20.8
-    # via bleach
+    # via
+    #   bleach
+    #   nbconvert
 pandocfilters==1.4.3
     # via nbconvert
 parso==0.8.1
@@ -131,7 +139,7 @@ six==1.15.0
     #   python-dateutil
 soupsieve==2.2.1
     # via beautifulsoup4
-testpath==0.4.4
+tinycss2==1.1.1
     # via nbconvert
 tornado==6.1
     # via jupyter-client
@@ -149,7 +157,9 @@ unidecode==1.1.2
 wcwidth==0.2.5
     # via prompt-toolkit
 webencodings==0.5.1
-    # via bleach
+    # via
+    #   bleach
+    #   tinycss2
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools