diff --git a/index.html b/index.html
index 35f497a..09cb627 100644
--- a/index.html
+++ b/index.html
@@ -108,6 +108,7 @@ <h2>Which errors does this fix?</h2>
       <li><code>Could not load project: {"validationError":"Could not parse as a valid SB2 or SB3 project.","sb3Errors":[{"keyword":"enum","dataPath":".targets[0].name","schemaPath":"sb3_definitions.json#/definitions/stage/properties/name/enum","params":{"allowedValues":["Stage"]},"message":"should be equal to one of the allowed values"}],"sb2Errors":[{"keyword":"required","dataPath":"","schemaPath":"#/required","params":{"missingProperty":"objName"},"message":"should have required property 'objName'"}]}</code></li>
       <li><code>Could not load project: {"validationError":"Could not parse as a valid SB2 or SB3 project.","sb3Errors":[{"keyword":"minItems","dataPath":".targets[0].costumes","schemaPath":"#/properties/costumes/minItems","params":{"limit":1},"message":"should NOT have less than 1 items"}],"sb2Errors":[{"keyword":"required","dataPath":"","schemaPath":"#/required","params":{"missingProperty":"objName"},"message":"should have required property 'objName'"}]}</code></li>
       <li><code>Could not load project: {"validationError":"Could not parse as a valid SB2 or SB3 project.","sb3Errors":[{"keyword":"required","dataPath":".targets[0].costumes[0]","schemaPath":"#/required","params":{"missingProperty":"assetId"},"message":"should have required property 'assetId'"}],"sb2Errors":[{"keyword":"required","dataPath":"","schemaPath":"#/required","params":{"missingProperty":"objName"},"message":"should have required property 'objName'"}]}</code></li>
+      <li><code>Could not load project: {"validationError":"Could not parse as a valid SB2 or SB3 project.","sb3Errors":[{"keyword":"type","dataPath":".targets[0].variables['`jEk@4|i[#Fk?(8x)AV.-my variable'][1]","schemaPath":"#/definitions/stringOrNumber/oneOf/0/type","params":{"type":"string"},"message":"should be string"},{"keyword":"type","dataPath":".targets[0].variables['`jEk@4|i[#Fk?(8x)AV.-my variable'][1]","schemaPath":"#/definitions/stringOrNumber/oneOf/1/type","params":{"type":"number"},"message":"should be number"},{"keyword":"oneOf","dataPath":".targets[0].variables['`jEk@4|i[#Fk?(8x)AV.-my variable'][1]","schemaPath":"#/definitions/stringOrNumber/oneOf","params":{"passingSchemas":null},"message":"should match exactly one schema in oneOf"}...}</code></li>
     </ul>
     <p>The best way to see if you're in luck is to just try it.</p>
 
diff --git a/samples/invalid-variable-values.sb3 b/samples/invalid-variable-values.sb3
new file mode 100644
index 0000000..3ff11fc
Binary files /dev/null and b/samples/invalid-variable-values.sb3 differ
diff --git a/sb3fix.js b/sb3fix.js
index 6ec5415..9acbd7e 100644
--- a/sb3fix.js
+++ b/sb3fix.js
@@ -237,7 +237,7 @@ var sb3fix = (function() {
         throw new Error('lists is not an object');
       }
       for (const [listId, list] of Object.entries(lists)) {
-        fixVariableInPlace(listId, list);
+        fixListInPlace(listId, list);
       }
     };
 
@@ -311,13 +311,50 @@ var sb3fix = (function() {
      */
     const fixVariableInPlace = (id, variable) => {
       if (!Array.isArray(variable)) {
-        throw new Error(`variable or list ${id} is not an array`);
+        throw new Error(`variable object ${id} is not an array`);
       }
+
       const name = variable[0];
       if (typeof name !== 'string') {
         log(`variable or list ${id} name was not a string`);
         variable[0] = String(variable[0]);
       }
+
+      const value = variable[1];
+      if (typeof value !== 'number' && typeof value !== 'string' && typeof value !== 'boolean') {
+        log(`variable ${id} value was not a Scratch-compatible value`);
+        variable[1] = String(variable[1]);
+      }
+    };
+
+    /**
+     * @param {string} id
+     * @param {unknown} list
+     */
+    const fixListInPlace = (id, list) => {
+      if (!Array.isArray(list)) {
+        throw new Error(`list object ${id} is not an array`);
+      }
+
+      const name = list[0];
+      if (typeof name !== 'string') {
+        log(`list ${id} name was not a string`);
+        list[0] = String(list[0]);
+      }
+
+      if (!Array.isArray(list[1])) {
+        log(`list ${id} value was not an array`);
+        list[1] = [];
+      }
+
+      const listValue = list[1];
+      for (let i = 0; i < listValue.length; i++) {
+        const value = listValue[i];
+        if (typeof value !== 'number' && typeof value !== 'string' && typeof value !== 'boolean') {
+          log(`list ${id} index ${i} was not a Scratch-compatible value`);
+          listValue[i] = String(value);
+        }
+      }
     };
 
     /**