diff --git a/nextjs/csp/policies/app.ts b/nextjs/csp/policies/app.ts
index c1b5355516..e00490d5d2 100644
--- a/nextjs/csp/policies/app.ts
+++ b/nextjs/csp/policies/app.ts
@@ -69,7 +69,9 @@ export function app(): CspDev.DirectiveDescriptor {
 
       // next.js generates and rebuilds source maps in dev using eval()
       // https://github.com/vercel/next.js/issues/14221#issuecomment-657258278
-      config.app.isDev ? KEY_WORDS.UNSAFE_EVAL : '',
+      // polkadot api doesn't work without 'usafe-eval' csp
+      // because webassembly uses eval under the hood
+      KEY_WORDS.UNSAFE_EVAL,
 
       // hash of ColorModeScript
       '\'sha256-e7MRMmTzLsLQvIy1iizO1lXf7VWYoQ6ysj5fuUzvRwE=\'',