diff --git a/docs/requirements-docs.txt b/docs/requirements-docs.txt
index 342ae58..edffc4b 100644
--- a/docs/requirements-docs.txt
+++ b/docs/requirements-docs.txt
@@ -1,15 +1,9 @@
-tox
-Sphinx
-docutils
-setuptools
-six
-sphinx_rtd_theme>=0.4.3
-sphinxcontrib-blockdiag
+lfdocs-conf~=0.7.5
+funcparserlib~=1.0.0a0
+sphinxcontrib.blockdiag~=2.0.0
 sphinxcontrib-needs<0.6.0
-sphinxcontrib-nwdiag
-sphinxcontrib-redoc
-sphinxcontrib-seqdiag
-sphinxcontrib-swaggerdoc
-sphinxcontrib-plantuml
-sphinx_bootstrap_theme
-lfdocs-conf
+sphinxcontrib.plantuml~=0.21
+sphinxcontrib.nwdiag~=2.0.0
+sphinxcontrib-seqdiag~=2.0.0
+sphinxcontrib-swaggerdoc~=0.1.7
+sphinx-rtd-theme~=1.0.0