diff --git a/package-lock.json b/package-lock.json
index 7a257523..3600555e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@inrupt/solid-react-components",
-  "version": "0.4.0",
+  "version": "0.4.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 56a213f0..23308d8e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@inrupt/solid-react-components",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "Solid React Components",
   "main": "build/index.js",
   "prettier": {
diff --git a/src/lib/hooks/useShex.js b/src/lib/hooks/useShex.js
index d6299f73..18c9ce98 100644
--- a/src/lib/hooks/useShex.js
+++ b/src/lib/hooks/useShex.js
@@ -404,7 +404,7 @@ export const useShex = (fileShex: String, documentUri: String, rootShape: String
             valueExpr: JSON.parse(e.target.getAttribute('data-valuexpr')),
             parentName: e.target.getAttribute('data-parent-name')
         };
-        const currentValue = shexData.formValues[e.target.name];
+        const currentValue = shexData.formValues && shexData.formValues[e.target.name];
         /** keep warning message after onBlur */
         const mergedData = {
             [e.target.name]: {