diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5d89167..96de75a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,13 +1,13 @@
 wget==3.2
-xmlschema==1.2.2
-docutils==0.15.2
-sphinx== 3.*
-sphinx-rtd-theme==0.5.*
-sphinxcontrib-applehelp==1.0.1
-sphinxcontrib-contentui==0.2.4
-sphinxcontrib-devhelp==1.0.1
-sphinxcontrib-htmlhelp==1.0.2
+xmlschema==1.9.2
+docutils==0.18.0
+Sphinx==4.4.0
+sphinx-rtd-theme==1.0.0
+sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-contentui==0.2.5
+sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-htmlhelp==2.0.0
 sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-qthelp==1.0.2
-sphinxcontrib-serializinghtml==1.1.3
-git+http://github.com/return42/linuxdoc.git
+sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-serializinghtml==1.1.5
+linuxdoc==20211220