diff --git a/mkdocs.yml b/mkdocs.yml
index d058b3d..b017d91 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -79,10 +79,9 @@ plugins:
 # Extensions
 markdown_extensions:
   - admonition
-  - attr_list
-  - meta
+  # - attr_list
+  # - meta
   - pymdownx.details
-  - markdown.extensions.codehilite
   - pymdownx.highlight
   - pymdownx.superfences
   - pymdownx.emoji:
diff --git a/requirements.txt b/requirements.txt
index fe67349..b2a7157 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,24 +1,23 @@
-click==7.1.2
-future==0.18.2
-Jinja2==2.11.2
-joblib==0.16.0
-livereload==2.6.3
-lunr==0.5.8
-Markdown==3.2.2
-MarkupSafe==1.1.1
-mkdocs==1.1.2
-mkdocs-macros-plugin==0.4.9
-mkdocs-material==5.5.12
-mkdocs-material-extensions==1.0
-nltk==3.5
-pip-autoremove==0.9.1
-Pygments==2.7.1
-pymdown-extensions==8.0
-python-dateutil==2.8.1
-PyYAML==5.3.1
-regex==2020.7.14
-repackage==0.7.3
-six==1.15.0
-termcolor==1.1.0
-tornado==6.0.4
-tqdm==4.49.0
+click>=7.1.2,<8.0
+future>=0.18.2,<1.0
+Jinja2>=2.11.2,<3.0
+joblib>=0.16.0,<1.0
+livereload>=2.6.3,<3.0
+lunr>=0.5.8,<1.0
+Markdown>=3.2.2,<4.0
+MarkupSafe>=1.1.1,<2.0
+mkdocs>=1.1.2,<2.0
+mkdocs-macros-plugin>=0.4.9,<1.0
+mkdocs-material>=5.5.12,<6.0
+mkdocs-material-extensions>=1.0,<2.0
+nltk>=3.5,<4.0
+Pygments>=2.7.1,<3.0
+pymdown-extensions>=8.0,<9.0
+python-dateutil>=2.8.1,<3.0
+PyYAML>=5.3.1,<6.0
+regex>=2020.7.14,<2021.0
+repackage>=0.7.3,<1.0
+six>=1.15.0,<2.0
+termcolor>=1.1.0,<2.0
+tornado>=6.0.4,<7.0
+tqdm>=4.49.0,<5.0