diff --git a/requirements.txt b/requirements.txt
index 0cce47e..eedbe4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ crabnet==2.0.2
 conda-souschef==2.2.3
 scikit-learn==1.2.0
 myst-parser==0.18.1
-sphinx==5.3.0
+sphinx==6.1.2
 sphinx_rtd_theme==1.1.1
 sphinx_copybutton==0.5.1
 composition-based-feature-vector==1.0.4