diff --git a/requirements-dev.txt b/requirements-dev.txt
index 4f9c924..23e2d2c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -12,7 +12,7 @@ argh==0.26.2
     # via sphinx-autobuild
 attrs==19.3.0
     # via pytest
-babel==2.8.0
+babel==2.9.1
     # via sphinx
 bleach==3.3.0
     # via readme-renderer
@@ -100,26 +100,26 @@ pygments==2.7.4
     #   sphinx
 pyparsing==2.4.6
     # via packaging
-pytest-cov==2.8.1
-    # via -r requirements-dev.in
 pytest==5.4.1
     # via
     #   -r requirements-dev.in
     #   pytest-cov
+pytest-cov==2.8.1
+    # via -r requirements-dev.in
 pytz==2019.3
     # via babel
 pyyaml==5.4
     # via sphinx-autobuild
 readme-renderer==25.0
     # via twine
-requests-toolbelt==0.9.1
-    # via twine
 requests==2.23.0
     # via
     #   -r requirements-dev.in
     #   requests-toolbelt
     #   sphinx
     #   twine
+requests-toolbelt==0.9.1
+    # via twine
 secretstorage==3.1.2
     # via keyring
 six==1.14.0
@@ -134,14 +134,14 @@ six==1.14.0
     #   virtualenv
 snowballstemmer==2.0.0
     # via sphinx
-sphinx-autobuild==0.7.1
-    # via -r requirements-dev.in
-sphinx-rtd-theme==0.4.3
-    # via -r requirements-dev.in
 sphinx==2.4.4
     # via
     #   -r requirements-dev.in
     #   sphinx-rtd-theme
+sphinx-autobuild==0.7.1
+    # via -r requirements-dev.in
+sphinx-rtd-theme==0.4.3
+    # via -r requirements-dev.in
 sphinxcontrib-applehelp==1.0.2
     # via sphinx
 sphinxcontrib-devhelp==1.0.2