diff --git a/.gitmodules b/.gitmodules
index ea9814e6b..6a1fb3e47 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1410,6 +1410,10 @@
 	path = extensions/ultimate-dark-neo
 	url = https://github.com/rubjo/ultimate-dark-neo-zed.git
 
+[submodule "extensions/underground-theme"]
+	path = extensions/underground-theme
+	url = https://github.com/i-amdroid/zed-underground-theme.git
+
 [submodule "extensions/unicode"]
 	path = extensions/unicode
 	url = https://github.com/aripiprazole/zed-unicode.git
diff --git a/extensions.toml b/extensions.toml
index 88dcff2ea..fedf8b1da 100644
--- a/extensions.toml
+++ b/extensions.toml
@@ -1532,6 +1532,10 @@ version = "0.0.1"
 submodule = "extensions/ultimate-dark-neo"
 version = "0.0.5"
 
+[underground-theme]
+submodule = "extensions/underground-theme"
+version = "1.0.0"
+
 [unicode]
 submodule = "extensions/unicode"
 version = "0.1.5"
diff --git a/extensions/underground-theme b/extensions/underground-theme
new file mode 160000
index 000000000..8879f3769
--- /dev/null
+++ b/extensions/underground-theme
@@ -0,0 +1 @@
+Subproject commit 8879f376988e6a20c168848586263530d82f82ad