diff --git a/MRGelDosimetry.json b/MRGelDosimetry.json
new file mode 100644
index 00000000..f8f9cead
--- /dev/null
+++ b/MRGelDosimetry.json
@@ -0,0 +1,11 @@
+{
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-entry-schema-v1.0.1.json#",
+  "build_dependencies": [
+    "SlicerRT"
+  ],
+  "build_subdirectory": ".",
+  "category": "Radiotherapy",
+  "scm_revision": "main",
+  "scm_url": "https://github.com/gslle924/SlicerMRGelDosimetry",
+  "tier": 1
+}
\ No newline at end of file