diff --git a/package-lock.json b/package-lock.json
index 3e855af..e075cf9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "configurable-http-proxy",
-  "version": "4.6.3",
+  "version": "4.6.4-dev.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "configurable-http-proxy",
-      "version": "4.6.3",
+      "version": "4.6.4-dev.0",
       "license": "BSD-3-Clause",
       "dependencies": {
         "commander": "~7.2",
diff --git a/package.json b/package.json
index 534171d..7c8c4d1 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "4.6.3",
+  "version": "4.6.4-dev.0",
   "name": "configurable-http-proxy",
   "description": "A configurable-on-the-fly HTTP Proxy",
   "author": "Jupyter Developers",