diff --git a/specs/index.rst b/specs/index.rst
index 0076130..4de2fea 100644
--- a/specs/index.rst
+++ b/specs/index.rst
@@ -20,3 +20,5 @@
    ussuri/index
    victoria/index
    wallaby/index
+   xena/index
+   yoga/index
diff --git a/specs/xena/index.rst b/specs/xena/index.rst
new file mode 100644
index 0000000..6f990ef
--- /dev/null
+++ b/specs/xena/index.rst
@@ -0,0 +1,7 @@
+=====================
+ Xena Specifications
+=====================
+
+.. toctree::
+   :glob:
+   :maxdepth: 2
diff --git a/specs/yoga/index.rst b/specs/yoga/index.rst
new file mode 100644
index 0000000..5f6de54
--- /dev/null
+++ b/specs/yoga/index.rst
@@ -0,0 +1,7 @@
+=====================
+ Yoga Specifications
+=====================
+
+.. toctree::
+   :glob:
+   :maxdepth: 2