diff --git a/build/bring.js b/build/bring.js
index 937c88b..51a5bd4 100644
--- a/build/bring.js
+++ b/build/bring.js
@@ -16,17 +16,29 @@ class Bring {
      * Try to log into given account
      */
     async login() {
-        let data;
+        let resp;
+        let bodyText;
         try {
-            const resp = await fetch(`${this.url}bringauth`, {
+            resp = await fetch(`${this.url}bringauth`, {
                 method: 'POST',
                 body: new URLSearchParams({ email: this.mail, password: this.password })
             });
-            data = await resp.json();
+            // Read as text first so non-JSON bodies (e.g. text/plain "Invalid Email.",
+            // HTML maintenance pages, Cloudflare challenges) are preserved verbatim
+            // instead of being swallowed by resp.json() as "Failed to parse JSON".
+            bodyText = await resp.text();
         }
         catch (e) {
             throw new Error(`Cannot Login: ${e.message}`);
         }
+        let data;
+        try {
+            data = JSON.parse(bodyText);
+        }
+        catch (_a) {
+            const snippet = bodyText.trim().slice(0, 500) || '(empty body)';
+            throw new Error(`Cannot Login: ${resp.status} ${snippet}`);
+        }
         if ('error' in data) {
             throw new Error(`Cannot Login: ${data.message}`);
         }
diff --git a/build/bring.js.map b/build/bring.js.map
index c59e885..0905ff7 100644
--- a/build/bring.js.map
+++ b/build/bring.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/src/bring.ts b/src/bring.ts
index 467f7bc..5b78baf 100644
--- a/src/bring.ts
+++ b/src/bring.ts
@@ -152,19 +152,31 @@ class Bring {
      * Try to log into given account
      */
     async login(): Promise<void> {
-        let data: AuthResponse;
+        let resp: Response;
+        let bodyText: string;
 
         try {
-            const resp = await fetch(`${this.url}bringauth`, {
+            resp = await fetch(`${this.url}bringauth`, {
                 method: 'POST',
                 body: new URLSearchParams({ email: this.mail, password: this.password })
             });
 
-            data = await resp.json();
+            // Read as text first so non-JSON bodies (e.g. text/plain "Invalid Email.",
+            // HTML maintenance pages, Cloudflare challenges) are preserved verbatim
+            // instead of being swallowed by resp.json() as "Failed to parse JSON".
+            bodyText = await resp.text();
         } catch (e: any) {
             throw new Error(`Cannot Login: ${e.message}`);
         }
 
+        let data: AuthResponse;
+        try {
+            data = JSON.parse(bodyText);
+        } catch {
+            const snippet = bodyText.trim().slice(0, 500) || '(empty body)';
+            throw new Error(`Cannot Login: ${resp.status} ${snippet}`);
+        }
+
         if ('error' in data) {
             throw new Error(`Cannot Login: ${data.message}`);
         }