diff --git a/rollup.config.mjs b/rollup.config.mjs
index 69b4ed3..69ecedc 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -33,7 +33,7 @@ export default (commandlineargs) => {
         replace({
             "tag-name": TAG_NAME,
             "container-tag-name": CONTAINER_TAG_NAME,
-            "devModeValue": !production,
+            "devModeValue": `${!production}`,
             "versionStr": process.env.VERSION,
             preventAssignment: true,
         }),
diff --git a/src/index.ts b/src/index.ts
index 84eb4a3..db29405 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -29,7 +29,7 @@ declare global {
 const version = 'versionStr';
 console.info(`ExpanderCard Version: ${version}`);
 
-const devMode = 'devModeValue' as unknown as boolean;
+const devMode = ('devModeValue' as string) === 'true';
 
 window.customCards = window.customCards || [];
 window.customCards.push(...[