diff --git a/extensions/stable-diffusion-webui-devdark.json b/extensions/stable-diffusion-webui-devdark.json
new file mode 100644
index 00000000..9ca70f7d
--- /dev/null
+++ b/extensions/stable-diffusion-webui-devdark.json
@@ -0,0 +1,9 @@
+{
+    "name": "DevDark theme",
+    "url": "https://github.com/devdarktheme/stable-diffusion-webui-devdark.git",
+    "description": "Custom css based on Catppuccin, enable / disabled via extensions tab.",
+    "tags": [
+        "UI related"
+    ],
+    "added": "2023-10-17"
+}
\ No newline at end of file
diff --git a/index.json b/index.json
index 44786c96..a4ea9fbd 100644
--- a/index.json
+++ b/index.json
@@ -2350,6 +2350,15 @@
                 "manipulations"
             ],
             "added": "2023-10-17"
+        },
+        {
+            "name": "DevDark theme",
+            "url": "https://github.com/devdarktheme/stable-diffusion-webui-devdark.git",
+            "description": "Custom css based on Catppuccin, enable / disabled via extensions tab.",
+            "tags": [
+                "UI related"
+            ],
+            "added": "2023-10-17"
         }
     ]
 }
\ No newline at end of file