diff --git a/.gitmodules b/.gitmodules
index 9bac8e0e0..3780c8967 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,3 +13,9 @@
 [submodule "extensions-builtin/stable-diffusion-webui-images-browser"]
 	path = extensions-builtin/stable-diffusion-webui-images-browser
 	url = https://github.com/AlUlkesh/stable-diffusion-webui-images-browser
+[submodule "extensions-builtin/seed_travel"]
+	path = extensions-builtin/seed_travel
+	url = https://github.com/yownas/seed_travel
+[submodule "extensions-builtin/sd-webui-model-converter"]
+	path = extensions-builtin/sd-webui-model-converter
+	url = https://github.com/Akegarasu/sd-webui-model-converter
diff --git a/extensions-builtin/sd-webui-model-converter b/extensions-builtin/sd-webui-model-converter
new file mode 160000
index 000000000..1f9b51745
--- /dev/null
+++ b/extensions-builtin/sd-webui-model-converter
@@ -0,0 +1 @@
+Subproject commit 1f9b51745f64da7e00577c10bc95554e431b5dc4
diff --git a/extensions-builtin/seed_travel b/extensions-builtin/seed_travel
new file mode 160000
index 000000000..beef29d88
--- /dev/null
+++ b/extensions-builtin/seed_travel
@@ -0,0 +1 @@
+Subproject commit beef29d887866c46c7dd8203496b6a8abc3cc2ae