diff --git a/docker-compose.yaml b/docker-compose.yaml
index 39fab59..271a578 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -22,7 +22,7 @@ services:
 
   model-server-empty:
     # Keep the version in sync with the modelix version in gradle/libs.versions.toml
-    image: modelix/model-server:9.1.0
+    image: modelix/model-server:9.1.1
     container_name: ${COMPOSE_PROJECT_NAME}-model-server-empty
     profiles:
       - useCase1
@@ -32,7 +32,7 @@ services:
 
   model-server:
     # Keep the version in sync with the modelix version in gradle/libs.versions.toml
-    image: modelix/model-server:9.1.0
+    image: modelix/model-server:9.1.1
     container_name: ${COMPOSE_PROJECT_NAME}-model-server
     profiles:
       - useCase2
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index e535d9d..aa73da0 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -14,7 +14,7 @@ mpsGradlePlugin = "1.7.288.4ea765f"
 # * mps/metamodel-api-ts/package.json
 # * spa-management-vue/package.json
 # * spa-overview-angular/package.json
-modelixCore = "9.1.0"
+modelixCore = "9.1.1"
 mpsModelServerSyncPlugin = "2021.2.157"
 
 # backend 1 / SPA
diff --git a/mps/metamodel-api-ts/package-lock.json b/mps/metamodel-api-ts/package-lock.json
index 4effdba..48198e3 100644
--- a/mps/metamodel-api-ts/package-lock.json
+++ b/mps/metamodel-api-ts/package-lock.json
@@ -12,13 +12,13 @@
         "typescript": "^5.1.6"
       },
       "peerDependencies": {
-        "@modelix/ts-model-api": "9.1.0"
+        "@modelix/ts-model-api": "9.1.1"
       }
     },
     "node_modules/@modelix/ts-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.0.tgz",
-      "integrity": "sha512-JGZ7xs2/rEPa0NmX/7WnI2u9QC0tgn1LELOGWp666MoUZqmbUMV4wDdhCUy+Li6uzMixP1eegUiySaYCOg9N8g==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.1.tgz",
+      "integrity": "sha512-imGW8v4eDE4XTeuQylGLbOsuhKOUmG8wo3BVmleQuPGMcNQzkkkCMndHE/liwIHlEXgEm4CLBgEiMg+wzrRFGw==",
       "license": "Apache 2.0",
       "peer": true,
       "engines": {
@@ -48,9 +48,9 @@
   },
   "dependencies": {
     "@modelix/ts-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.0.tgz",
-      "integrity": "sha512-JGZ7xs2/rEPa0NmX/7WnI2u9QC0tgn1LELOGWp666MoUZqmbUMV4wDdhCUy+Li6uzMixP1eegUiySaYCOg9N8g==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.1.tgz",
+      "integrity": "sha512-imGW8v4eDE4XTeuQylGLbOsuhKOUmG8wo3BVmleQuPGMcNQzkkkCMndHE/liwIHlEXgEm4CLBgEiMg+wzrRFGw==",
       "peer": true
     },
     "@tsconfig/recommended": {
diff --git a/mps/metamodel-api-ts/package.json b/mps/metamodel-api-ts/package.json
index afd7187..47190a2 100644
--- a/mps/metamodel-api-ts/package.json
+++ b/mps/metamodel-api-ts/package.json
@@ -18,6 +18,6 @@
   "dependencies": {
   },
   "peerDependencies": {
-    "@modelix/ts-model-api": "9.1.0"
+    "@modelix/ts-model-api": "9.1.1"
   }
 }
diff --git a/spa-management-vue/package-lock.json b/spa-management-vue/package-lock.json
index 0ef618a..a94ac2c 100644
--- a/spa-management-vue/package-lock.json
+++ b/spa-management-vue/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.0",
       "dependencies": {
         "@mdi/font": "7.3.67",
-        "@modelix/vue-model-api": "9.1.0",
+        "@modelix/vue-model-api": "9.1.1",
         "core-js": "^3.33.1",
         "date-fns": "^2.30.0",
         "metamodel-api-ts": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",
@@ -259,7 +259,7 @@
         "ws": "^8.17.1"
       }
     },
-    "node_modules/@modelix/model-client/node_modules/@modelix/ts-model-api": {
+    "node_modules/@modelix/ts-model-api": {
       "version": "9.1.1",
       "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.1.tgz",
       "integrity": "sha512-imGW8v4eDE4XTeuQylGLbOsuhKOUmG8wo3BVmleQuPGMcNQzkkkCMndHE/liwIHlEXgEm4CLBgEiMg+wzrRFGw==",
@@ -269,23 +269,12 @@
         "npm": ">= 6.13.4"
       }
     },
-    "node_modules/@modelix/ts-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.0.tgz",
-      "integrity": "sha512-JGZ7xs2/rEPa0NmX/7WnI2u9QC0tgn1LELOGWp666MoUZqmbUMV4wDdhCUy+Li6uzMixP1eegUiySaYCOg9N8g==",
-      "license": "Apache 2.0",
-      "peer": true,
-      "engines": {
-        "node": ">= 10.18.1",
-        "npm": ">= 6.13.4"
-      }
-    },
     "node_modules/@modelix/vue-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/vue-model-api/-/vue-model-api-9.1.0.tgz",
-      "integrity": "sha512-sF/QgnprDLLNBbkmE8C+zRy/JMxx7hsxlWToc74SdswIR/PnbywQl24iTU12iog8HPXzWK+VRlzR3hT33Sc1CA==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/vue-model-api/-/vue-model-api-9.1.1.tgz",
+      "integrity": "sha512-i5/HSW9MiNij9hM+hdzTt4juZtYlVdjysRxTQfWgieduwQfR36iIjvWkRgFsLeIozWTZugYGNa00DUAfqJi2Hw==",
       "dependencies": {
-        "@modelix/model-client": "^9.1.0"
+        "@modelix/model-client": "^9.1.1"
       },
       "peerDependencies": {
         "vue": "^3.3.4"
@@ -1969,9 +1958,9 @@
     "node_modules/metamodel-api-ts": {
       "version": "1.0.0",
       "resolved": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",
-      "integrity": "sha512-94VoPmfP2HSqzf2phox/i0uwneuTmBWM9yKW0wsnt7mHXfC0iCwVlaqe2dBDTkpISqNei+Tn4xdj1Op47gOVQw==",
+      "integrity": "sha512-s8exyC0by3aM6HPK+8bbgSFw5e9DKUU4/QO31WJlRGd8vVHpTcsWbpuTsOT5mlPqSjVmBY0nv5vkmsLfMjD4tw==",
       "peerDependencies": {
-        "@modelix/ts-model-api": "9.1.0"
+        "@modelix/ts-model-api": "9.1.1"
       }
     },
     "node_modules/micromatch": {
diff --git a/spa-management-vue/package.json b/spa-management-vue/package.json
index 1abbdc3..bdaec0a 100644
--- a/spa-management-vue/package.json
+++ b/spa-management-vue/package.json
@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "@mdi/font": "7.3.67",
-    "@modelix/vue-model-api": "9.1.0",
+    "@modelix/vue-model-api": "9.1.1",
     "core-js": "^3.33.1",
     "date-fns": "^2.30.0",
     "metamodel-api-ts": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",
diff --git a/spa-overview-angular/package-lock.json b/spa-overview-angular/package-lock.json
index bf1b8e5..16cf52d 100644
--- a/spa-overview-angular/package-lock.json
+++ b/spa-overview-angular/package-lock.json
@@ -16,7 +16,7 @@
         "@angular/platform-browser": "^16.2.12",
         "@angular/platform-browser-dynamic": "^16.2.12",
         "@angular/router": "^16.2.12",
-        "@modelix/model-client": "9.1.0",
+        "@modelix/model-client": "9.1.1",
         "bulma": "^0.9.4",
         "date-fns": "^2.30.0",
         "metamodel-api-ts": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",
@@ -2957,13 +2957,13 @@
       "dev": true
     },
     "node_modules/@modelix/model-client": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/model-client/-/model-client-9.1.0.tgz",
-      "integrity": "sha512-Ip99SFc4zBg/zn6Fja37VsIinx3W7qWjhz+GxGIJVPORB6F+teaJe6zcP0YVuscw7rbpnBnmD4CmuU3MJ/ZL2Q==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/model-client/-/model-client-9.1.1.tgz",
+      "integrity": "sha512-u3qYNmu+oWaUYy9e0chLVf3DZtKy5rOe3u0pk2snuA5bGduUEtP/haYcr/MACG/72jvE7E73o4LfqZb9CPfCzg==",
       "dependencies": {
         "@aws-crypto/sha256-js": "^5.0.0",
         "@js-joda/core": "3.2.0",
-        "@modelix/ts-model-api": "9.1.0",
+        "@modelix/ts-model-api": "9.1.1",
         "abort-controller": "3.0.0",
         "format-util": "^1.0.5",
         "js-base64": "^3.4.5",
@@ -2974,9 +2974,9 @@
       }
     },
     "node_modules/@modelix/ts-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.0.tgz",
-      "integrity": "sha512-JGZ7xs2/rEPa0NmX/7WnI2u9QC0tgn1LELOGWp666MoUZqmbUMV4wDdhCUy+Li6uzMixP1eegUiySaYCOg9N8g==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.1.tgz",
+      "integrity": "sha512-imGW8v4eDE4XTeuQylGLbOsuhKOUmG8wo3BVmleQuPGMcNQzkkkCMndHE/liwIHlEXgEm4CLBgEiMg+wzrRFGw==",
       "license": "Apache 2.0",
       "engines": {
         "node": ">= 10.18.1",
@@ -8720,9 +8720,9 @@
     "node_modules/metamodel-api-ts": {
       "version": "1.0.0",
       "resolved": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",
-      "integrity": "sha512-94VoPmfP2HSqzf2phox/i0uwneuTmBWM9yKW0wsnt7mHXfC0iCwVlaqe2dBDTkpISqNei+Tn4xdj1Op47gOVQw==",
+      "integrity": "sha512-s8exyC0by3aM6HPK+8bbgSFw5e9DKUU4/QO31WJlRGd8vVHpTcsWbpuTsOT5mlPqSjVmBY0nv5vkmsLfMjD4tw==",
       "peerDependencies": {
-        "@modelix/ts-model-api": "9.1.0"
+        "@modelix/ts-model-api": "9.1.1"
       }
     },
     "node_modules/methods": {
@@ -15088,13 +15088,13 @@
       "dev": true
     },
     "@modelix/model-client": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/model-client/-/model-client-9.1.0.tgz",
-      "integrity": "sha512-Ip99SFc4zBg/zn6Fja37VsIinx3W7qWjhz+GxGIJVPORB6F+teaJe6zcP0YVuscw7rbpnBnmD4CmuU3MJ/ZL2Q==",
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/model-client/-/model-client-9.1.1.tgz",
+      "integrity": "sha512-u3qYNmu+oWaUYy9e0chLVf3DZtKy5rOe3u0pk2snuA5bGduUEtP/haYcr/MACG/72jvE7E73o4LfqZb9CPfCzg==",
       "requires": {
         "@aws-crypto/sha256-js": "^5.0.0",
         "@js-joda/core": "3.2.0",
-        "@modelix/ts-model-api": "9.1.0",
+        "@modelix/ts-model-api": "9.1.1",
         "abort-controller": "3.0.0",
         "format-util": "^1.0.5",
         "js-base64": "^3.4.5",
@@ -15105,9 +15105,9 @@
       }
     },
     "@modelix/ts-model-api": {
-      "version": "9.1.0",
-      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.0.tgz",
-      "integrity": "sha512-JGZ7xs2/rEPa0NmX/7WnI2u9QC0tgn1LELOGWp666MoUZqmbUMV4wDdhCUy+Li6uzMixP1eegUiySaYCOg9N8g=="
+      "version": "9.1.1",
+      "resolved": "https://artifacts.itemis.cloud/repository/npm-open/@modelix/ts-model-api/-/ts-model-api-9.1.1.tgz",
+      "integrity": "sha512-imGW8v4eDE4XTeuQylGLbOsuhKOUmG8wo3BVmleQuPGMcNQzkkkCMndHE/liwIHlEXgEm4CLBgEiMg+wzrRFGw=="
     },
     "@ngtools/webpack": {
       "version": "16.2.14",
@@ -19492,7 +19492,7 @@
     },
     "metamodel-api-ts": {
       "version": "file:..\\mps\\metamodel-api-ts\\build\\packages\\metamodel-api-ts-1.0.0.tgz",
-      "integrity": "sha512-94VoPmfP2HSqzf2phox/i0uwneuTmBWM9yKW0wsnt7mHXfC0iCwVlaqe2dBDTkpISqNei+Tn4xdj1Op47gOVQw==",
+      "integrity": "sha512-s8exyC0by3aM6HPK+8bbgSFw5e9DKUU4/QO31WJlRGd8vVHpTcsWbpuTsOT5mlPqSjVmBY0nv5vkmsLfMjD4tw==",
       "requires": {}
     },
     "methods": {
diff --git a/spa-overview-angular/package.json b/spa-overview-angular/package.json
index 0c3e5e0..2d51d29 100644
--- a/spa-overview-angular/package.json
+++ b/spa-overview-angular/package.json
@@ -18,7 +18,7 @@
     "@angular/platform-browser": "^16.2.12",
     "@angular/platform-browser-dynamic": "^16.2.12",
     "@angular/router": "^16.2.12",
-    "@modelix/model-client": "9.1.0",
+    "@modelix/model-client": "9.1.1",
     "bulma": "^0.9.4",
     "date-fns": "^2.30.0",
     "metamodel-api-ts": "file:../mps/metamodel-api-ts/build/packages/metamodel-api-ts-1.0.0.tgz",