diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index 9547372c5..fa5d03ea0 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -37745,7 +37745,6 @@ var TextSecureServer = (function() {
             return this.ajax({
                 call                : 'signed',
                 httpType            : 'PUT',
-                responseType        : 'json',
                 jsonData            : {
                     keyId: signedPreKey.keyId,
                     publicKey: btoa(getString(signedPreKey.publicKey)),
diff --git a/libtextsecure/api.js b/libtextsecure/api.js
index 055f10ba3..0c20d8416 100644
--- a/libtextsecure/api.js
+++ b/libtextsecure/api.js
@@ -308,7 +308,6 @@ var TextSecureServer = (function() {
             return this.ajax({
                 call                : 'signed',
                 httpType            : 'PUT',
-                responseType        : 'json',
                 jsonData            : {
                     keyId: signedPreKey.keyId,
                     publicKey: btoa(getString(signedPreKey.publicKey)),