diff --git a/requirements-dev.txt b/requirements-dev.txt
index 01d563a..7e74352 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,4 +7,4 @@ pytest-cov==2.8.1
 coveralls==1.10.0
 
 # Documentation
-Sphinx==1.8.5
+Sphinx==3.2.1
diff --git a/requirements.txt b/requirements.txt
index 00fdc44..962f640 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 language-tags==0.4.6
 rfc3987==1.3.8
-pyld==1.0.5
-html5lib==1.0.1
+pyld==2.0.3
+html5lib==1.1