diff --git a/xmpl/mtx/sidecar/package.json b/xmpl/mtx/sidecar/package.json
index 7e291678..70600e53 100644
--- a/xmpl/mtx/sidecar/package.json
+++ b/xmpl/mtx/sidecar/package.json
@@ -3,7 +3,7 @@
     "dependencies": {
         "@cap-js/hana": "^3.0.0",
         "@sap/cds": "^10.0.0",
-        "@sap/cds-mtxs": "^3",
+        "@sap/cds-mtxs": "^4.0.0",
         "@sap/xssec": "^4",
         "express": "^5.0.0"
     },
diff --git a/xmpl/package.json b/xmpl/package.json
index e5460e35..1ac23a01 100644
--- a/xmpl/package.json
+++ b/xmpl/package.json
@@ -6,7 +6,7 @@
         "@cap-js/graphql": "^0.14.0",
         "@cap-js/ord": "file:../../ord",
         "@cap-js/sqlite": ">=2",
-        "@sap/cds-mtxs": "^3",
+        "@sap/cds-mtxs": "^4.0.0",
         "sap-sai-supplier-v1": "file:./srv/imported/sap-sai-supplier-v1",
         "sap-s4com-supplier-v1": "file:./srv/imported/sap-s4com-supplier-v1"
     },