diff --git a/doc/requirements.txt b/doc/requirements.txt
index 6aa0e938c..c7fa3d6c0 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,4 @@
 breathe==4.33.1
 sphinx==4.2.0
 ampl-sphinx-theme @ git+/~https://github.com/ampl/ampl.github.io.git#subdirectory=ampl-sphinx-theme
+sphinx-tabs==3.4.5