diff --git a/package-lock.json b/package-lock.json
index 2ac4362..c7b420e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@hltcoe/concrete",
-  "version": "4.18.3",
+  "version": "4.18.4-dev.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@hltcoe/concrete",
-      "version": "4.18.3",
+      "version": "4.18.4-dev.0",
       "license": "SEE LICENSE IN LICENSE.txt",
       "dependencies": {
         "adm-zip": "^0.5.10",
diff --git a/package.json b/package.json
index b698b4c..f805e81 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hltcoe/concrete",
-  "version": "4.18.3",
+  "version": "4.18.4-dev.0",
   "description": "Node.js library for working with Concrete, a data serialization format for NLP",
   "main": "concrete.js",
   "types": "concrete.d.ts",