diff --git a/datafit/CHANGELOG.md b/datafit/CHANGELOG.md
index 412c7bd1..88befe2f 100644
--- a/datafit/CHANGELOG.md
+++ b/datafit/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.0.3
+
+- `T extends VariableType` (without this, we can assign any type to `T`)
+
 ## 1.0.2
 
 - Change compiler library to `es2015`
diff --git a/datafit/package.json b/datafit/package.json
index 83a3da5e..57fe07d8 100644
--- a/datafit/package.json
+++ b/datafit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "datafit",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Simple curve-fitting algorithm",
   "main": "dist/index.js",
   "types": "types/index.d.ts",