diff --git a/src/services/rln.ts b/src/services/rln.ts
index be2a1b9..507f5e8 100644
--- a/src/services/rln.ts
+++ b/src/services/rln.ts
@@ -109,9 +109,12 @@ export class RLN implements IRLN {
 
   private initKeystore(): Keystore {
     const localKeystoreString = localStorage.getItem("keystore");
-    const _keystore = Keystore.fromString(localKeystoreString || "");
-
-    return _keystore || Keystore.create();
+    
+    try {
+      return Keystore.fromString(localKeystoreString || "");
+    } catch(error) {
+      return Keystore.create();
+    }
   }
 
   public addEventListener(name: RLNEventsNames, fn: EventListener) {
diff --git a/src/services/waku.ts b/src/services/waku.ts
index a2e69c2..b5e3c28 100644
--- a/src/services/waku.ts
+++ b/src/services/waku.ts
@@ -53,7 +53,7 @@ class Relay {
 
       this.subscriptionRoutine = window.setInterval(async () => {
         await this.fetchMessages();
-      }, SECOND);
+      }, 10 * SECOND);
 
       this.contentTopicListeners.set(contentTopic, 1);
     } catch (error) {
@@ -84,7 +84,7 @@ class Relay {
   }
 
   private async fetchMessages(): Promise<void> {
-    const contentTopic = Object.keys(this.contentTopicListeners)[0];
+    const contentTopic = Array.from(this.contentTopicListeners.keys())[0];
 
     if (!contentTopic) {
       return;
diff --git a/src/utils/http.ts b/src/utils/http.ts
index 4dcfa25..47e8522 100644
--- a/src/utils/http.ts
+++ b/src/utils/http.ts
@@ -5,9 +5,7 @@ export const http = {
             mode: "no-cors",
             referrerPolicy: "no-referrer", 
             headers: {
-                'Accept': 'application/json',
-                'Content-Type': 'application/json',
-                "Access-Control-Allow-Origin": "*",
+                'Content-Type': 'text/plain',
             },
             body: JSON.stringify(body)
           });
@@ -18,9 +16,7 @@ export const http = {
             mode: "no-cors",
             referrerPolicy: "no-referrer", 
             headers: {
-                'Accept': 'application/json',
-                'Content-Type': 'application/json',
-                "Access-Control-Allow-Origin": "*",
+                'Content-Type': 'text/plain',
             },
             body: JSON.stringify(body)
           });