diff --git a/SlicerIGSpineDeformity.json b/SlicerIGSpineDeformity.json
new file mode 100644
index 000000000..98e85d3cc
--- /dev/null
+++ b/SlicerIGSpineDeformity.json
@@ -0,0 +1,8 @@
+{
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-entry-schema-v1.0.0.json#",
+  "build_dependencies": [],
+  "build_subdirectory": ".",
+  "category": "IGT",
+  "scm_revision": "master",
+  "scm_url": "https://github.com/SenonETS/SlicerIGSpineDeformity.git"
+}
diff --git a/SlicerIGSpineDeformity.s4ext b/SlicerIGSpineDeformity.s4ext
deleted file mode 100644
index 68a4b403c..000000000
--- a/SlicerIGSpineDeformity.s4ext
+++ /dev/null
@@ -1,44 +0,0 @@
-#
-# First token of each non-comment line is the keyword and the rest of the line
-# (including spaces) is the value.
-# - the value can be blank
-#
-
-# This is source code manager (i.e. svn)
-scm git
-scmurl https://github.com/SenonETS/SlicerIGSpineDeformity.git
-scmrevision master
-
-# list dependencies
-# - These should be names of other modules that have .s4ext files
-# - The dependencies will be built first
-depends NA
-
-# Inner build directory (default is ".")
-build_subdirectory .
-
-# homepage
-homepage https://github.com/SenonETS/SlicerIGSpineDeformity
-
-# Firstname1 Lastname1 ([SubOrg1, ]Org1), Firstname2 Lastname2 ([SubOrg2, ]Org2)
-# For example: Jane Roe (Superware), John Doe (Lab1, Nowhere), Joe Bloggs (Noware)
-contributors Sen Li (École de technologie supérieure)
-
-# Match category in the xml description of the module (where it shows up in Modules menu)
-category IGT
-
-# url to icon (png, size 128x128 pixels)
-iconurl https://github.com/SenonETS/SlicerIGSpineDeformity/blob/main/SlicerIGSpineDeformity_Icon_128x128.png
-
-# Give people an idea what to expect from this code
-#  - Is it just a test or something you stand behind?
-status 
-
-# One line stating what the module does
-description This Module is designed for spine deformity analysis using freehand 3D ultrasound imaging, and the first module Lamina Landmark Labeling help find the Spinal Cord curve in 3D, which can be projected to three anatomical planes, e.g., for Scoliosis analysis using the Cobb angle when projected to the front back view.
-
-# Space separated list of urls
-screenshoturls https://github.com/SenonETS/SlicerIGSpineDeformity/blob/main/sl_01__LaminaLandmark_Labeling/SL_ScreenShot.PNG
-
-# 0 or 1: Define if the extension should be enabled after its installation.
-enabled 1
\ No newline at end of file