diff --git a/requirements.txt b/requirements.txt
index d5d69f1..d4e27e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-Sphinx>=1.3.1
-sphinx-rtd-theme>=0.1.8
-sphinx-autobuild>=0.5.2
+Sphinx~=3.0.0
+sphinx-rtd-theme~=0.4.3
+sphinx-autobuild~=0.7.1