diff --git a/package-lock.json b/package-lock.json
index cf343ac..1cbbf99 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,8 @@
 {
-  "requires": true,
+  "name": "@syndicate-lang/syntax-test",
+  "version": "0.0.0",
   "lockfileVersion": 1,
+  "requires": true,
   "dependencies": {
     "@babel/code-frame": {
       "version": "7.0.0",
@@ -623,6 +625,16 @@
         "regexpu-core": "^4.1.3"
       }
     },
+    "@babel/polyfill": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/polyfill/-/polyfill-7.0.0.tgz",
+      "integrity": "sha512-dnrMRkyyr74CRelJwvgnnSUDh2ge2NCTyHVwpOdvRMHtJUyxLtMAfhBN3s64pY41zdw0kgiLPh6S20eb1NcX6Q==",
+      "dev": true,
+      "requires": {
+        "core-js": "^2.5.7",
+        "regenerator-runtime": "^0.11.1"
+      }
+    },
     "@babel/preset-env": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.1.0.tgz",
@@ -711,6 +723,23 @@
         "to-fast-properties": "^2.0.0"
       }
     },
+    "@syndicate-lang/core": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/@syndicate-lang/core/-/core-0.0.1.tgz",
+      "integrity": "sha512-fTX5i7MStDPzfOHKXPnqFELZuucFWVYg48B5biOAW5ZXYkb1p6WrbtRZmiMKlIBPZfI5/N1qORC4g9Qkas3DvA==",
+      "requires": {
+        "immutable": "^3.8.2"
+      }
+    },
+    "@syndicate-lang/syntax": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/@syndicate-lang/syntax/-/syntax-0.0.1.tgz",
+      "integrity": "sha512-bQo/UCe6i+fThlRX8yg/N7wkFAug6UOZE67S/PU8Y0iAoP8nIi+ktd85tDJQY7yIrdJcL1bulYCuPIBtlExNgw==",
+      "dev": true,
+      "requires": {
+        "@babel/polyfill": "^7.0.0"
+      }
+    },
     "ansi-styles": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
@@ -772,6 +801,12 @@
         "safe-buffer": "~5.1.1"
       }
     },
+    "core-js": {
+      "version": "2.5.7",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.7.tgz",
+      "integrity": "sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw==",
+      "dev": true
+    },
     "debug": {
       "version": "3.2.6",
       "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
@@ -811,6 +846,11 @@
       "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
       "dev": true
     },
+    "immutable": {
+      "version": "3.8.2",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-3.8.2.tgz",
+      "integrity": "sha1-wkOZUUVbs5kT2vKBN28VMOEErfM="
+    },
     "invariant": {
       "version": "2.2.4",
       "resolved": "https://registry.npmjs.org/invariant/-/invariant-2.2.4.tgz",
@@ -901,6 +941,12 @@
         "regenerate": "^1.4.0"
       }
     },
+    "regenerator-runtime": {
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+      "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
+      "dev": true
+    },
     "regenerator-transform": {
       "version": "0.13.3",
       "resolved": "https://registry.npmjs.org/regenerator-transform/-/regenerator-transform-0.13.3.tgz",
diff --git a/package.json b/package.json
index 8e2fc7b..e099dc1 100644
--- a/package.json
+++ b/package.json
@@ -11,9 +11,9 @@
   "devDependencies": {
     "@babel/core": "^7.1.2",
     "@babel/preset-env": "^7.1.0",
-    "@syndicate-lang/syntax": "^0.x"
+    "@syndicate-lang/syntax": ">=0.0.1"
   },
   "dependencies": {
-    "@syndicate-lang/core": "^0.x"
-  },
+    "@syndicate-lang/core": ">=0.0.1"
+  }
 }
diff --git a/src/msgspeed.js b/src/msgspeed.js
index c05d374..94597f6 100644
--- a/src/msgspeed.js
+++ b/src/msgspeed.js
@@ -17,7 +17,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 //---------------------------------------------------------------------------
 
-var Dataspace = require('syndicate-ijs').Dataspace;
+var Dataspace = require('@syndicate-lang/core').Dataspace;
 
 const N = 100000;