diff --git a/giza/requirements.txt b/giza/requirements.txt
index 51052ec40..11923ef3c 100644
--- a/giza/requirements.txt
+++ b/giza/requirements.txt
@@ -31,7 +31,7 @@ requests-oauthlib==0.6.0
 requests-toolbelt==0.6.0
 rstcloth==0.2.5
 six==1.10.0
-Sphinx==1.2.3
+Sphinx==3.3.0
 sphinx-intl==0.9.9
 sphinxcontrib-httpdomain==1.4.0
 tlslite==0.4.9