diff --git a/requirements.txt b/requirements.txt
index 97b4e227..6d3da426 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ requests==2.19.1
 setuptools_scm>=1.15.0
 six==1.11.0
 snowballstemmer==1.2.1
-Sphinx==1.7.4
+Sphinx==8.1.3
 sphinxcontrib-websupport==1.1.0
 tox==3.0.0
 typing==3.6.4
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5404d8d3..79273872 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -46,7 +46,7 @@ requests==2.19.1
 setuptools_scm>=1.15.0
 six==1.11.0
 snowballstemmer==1.2.1
-Sphinx==1.7.4
+Sphinx==8.1.3
 sphinxcontrib-websupport==1.1.0
 tox==3.0.0
 typing==3.6.4