diff --git a/.gitmodules b/.gitmodules
index c99f531..3439e0b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "CircuitsVis"]
 	path = CircuitsVis
 	url = https://github.com/ojh31/CircuitsVis.git
+[submodule "TransformerLens"]
+	path = TransformerLens
+	url = https://github.com/ojh31/TransformerLens.git
diff --git a/TransformerLens b/TransformerLens
new file mode 160000
index 0000000..69df77c
--- /dev/null
+++ b/TransformerLens
@@ -0,0 +1 @@
+Subproject commit 69df77c1afe53fa280231d6f5fe466e79dd78c5d