diff --git a/dev-requirements.txt b/dev-requirements.txt
index e3e2aa1..71ae2a2 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -18,7 +18,7 @@ charset-normalizer==2.0.4
     # via requests
 commonmark==0.9.1
     # via recommonmark
-coverage==5.5
+coverage[toml]==5.5
     # via pytest-cov
 distlib==0.3.2
     # via virtualenv
@@ -64,7 +64,7 @@ pytest==6.2.5
     # via
     #   -r dev-requirements.in
     #   pytest-cov
-pytest-cov==2.12.1
+pytest-cov==3.0.0
     # via -r dev-requirements.in
 pytz==2021.1
     # via
@@ -83,7 +83,7 @@ six==1.16.0
     #   virtualenv
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==4.1.2
+sphinx==4.2.0
     # via
     #   -r dev-requirements.in
     #   recommonmark
@@ -101,8 +101,8 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 toml==0.10.2
     # via
+    #   coverage
     #   pytest
-    #   pytest-cov
     #   tox
 tomli==1.2.1
     # via setuptools-scm