diff --git a/requirements-docs.txt b/requirements-docs.txt
index 73bb0277..ebf0edc0 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -20,7 +20,7 @@ pytz==2019.3              # via babel
 requests==2.25.1          # via sphinx
 six==1.15.0               # via packaging, sphinxcontrib-httpdomain
 snowballstemmer==2.0.0    # via sphinx
-sphinx-rtd-theme==0.5.0   # via -r requirements-docs.in
+sphinx-rtd-theme==0.5.1   # via -r requirements-docs.in
 sphinx==3.4.2             # via -r requirements-docs.in, sphinx-rtd-theme, sphinxcontrib-httpdomain
 sphinxcontrib-applehelp==1.0.2  # via sphinx
 sphinxcontrib-devhelp==1.0.2  # via sphinx