diff --git a/packages/viz/CHANGELOG.md b/packages/viz/CHANGELOG.md
index af8bdb2..d41f858 100644
--- a/packages/viz/CHANGELOG.md
+++ b/packages/viz/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## Unreleased
+
 ## 3.10.0
 
 * Add renderFormats() method.
diff --git a/packages/viz/package.json b/packages/viz/package.json
index fe1d34e..bb4ee45 100644
--- a/packages/viz/package.json
+++ b/packages/viz/package.json
@@ -5,7 +5,7 @@
     "graphviz",
     "emscripten"
   ],
-  "version": "3.10.0",
+  "version": "3.10.0-dev",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/mdaines/viz-js.git",