diff --git a/config/oac b/config/oac
index c1cfc910d92..dfff67569fb 160000
--- a/config/oac
+++ b/config/oac
@@ -1 +1 @@
-Subproject commit c1cfc910d92af43f8c27807a9a84c9c13f4fbc65
+Subproject commit dfff67569fb72dbf8d73a1dcf74d091dad93f71b
diff --git a/configure.ac b/configure.ac
index 0113bb110bb..c26b92820dd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1069,7 +1069,8 @@ AS_IF([test -z "$LEX" || \
 dnl Note that we have to double escape the URL below
 dnl so that the # it contains doesn't confuse the Autotools
 OAC_SETUP_SPHINX([$srcdir/docs/man/MPI_T.3],
-                 [[https://docs.open-mpi.org/en/main/developers/prerequisites.html#sphinx-and-therefore-python]])
+                 [[https://docs.open-mpi.org/en/main/developers/prerequisites.html#sphinx-and-therefore-python]],
+                 [$srcdir/docs/requirements.txt])
 
 #
 # File system case sensitivity