diff --git a/package.json b/package.json
index 7b5500c..940408c 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
   "dependencies": {
     "inherits": "2.0.3",
     "pouchdb-ajax": "6.3.4",
+    "pouchdb-binary-utils": "6.3.4",
     "pouchdb-promise": "6.3.4",
     "pouchdb-utils": "6.3.4",
     "url-join": "2.0.2",
diff --git a/src/admins.js b/src/admins.js
index 6d01603..0c4e77e 100644
--- a/src/admins.js
+++ b/src/admins.js
@@ -1,4 +1,4 @@
-import { AuthError, getConfigUrl, wrapError } from './utils';
+import { AuthError, getBasicAuthHeaders, getConfigUrl, wrapError } from './utils';
 
 import ajaxCore from 'pouchdb-ajax';
 import { assign, toPromise } from 'pouchdb-utils';
@@ -23,6 +23,7 @@ var signUpAdmin = toPromise(function (username, password, opts, callback) {
   var ajaxOpts = assign({
     method: 'PUT',
     url: url,
+    headers: getBasicAuthHeaders(db),
     body: '"' + password + '"',
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
@@ -45,6 +46,7 @@ var deleteAdmin = toPromise(function (username, opts, callback) {
   var ajaxOpts = assign({
     method: 'DELETE',
     url: url,
+    headers: getBasicAuthHeaders(db),
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
 });
diff --git a/src/authentication.js b/src/authentication.js
index b7e4ba6..f21e40b 100644
--- a/src/authentication.js
+++ b/src/authentication.js
@@ -1,6 +1,6 @@
 'use strict';
 
-import { AuthError, getSessionUrl, wrapError } from './utils';
+import { AuthError, getBasicAuthHeaders, getSessionUrl, wrapError } from './utils';
 
 import ajaxCore from 'pouchdb-ajax';
 import { assign, toPromise } from 'pouchdb-utils';
@@ -24,7 +24,7 @@ var logIn = toPromise(function (username, password, opts, callback) {
   var ajaxOpts = assign({
     method: 'POST',
     url: getSessionUrl(db),
-    headers: {'Content-Type': 'application/json'},
+    headers: assign({'Content-Type': 'application/json'}, getBasicAuthHeaders(db)),
     body: {name: username, password: password},
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
@@ -39,6 +39,7 @@ var logOut = toPromise(function (opts, callback) {
   var ajaxOpts = assign({
     method: 'DELETE',
     url: getSessionUrl(db),
+    headers: getBasicAuthHeaders(db),
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
 });
@@ -54,6 +55,7 @@ var getSession = toPromise(function (opts, callback) {
   var ajaxOpts = assign({
     method: 'GET',
     url: url,
+    headers: getBasicAuthHeaders(db),
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
 });
diff --git a/src/users.js b/src/users.js
index f3e1c06..af15c06 100644
--- a/src/users.js
+++ b/src/users.js
@@ -1,6 +1,6 @@
 'use strict';
 
-import { AuthError, getUsersUrl, wrapError } from './utils';
+import { AuthError, getBasicAuthHeaders, getUsersUrl, wrapError } from './utils';
 
 import Promise from 'pouchdb-promise';
 import ajaxCore from 'pouchdb-ajax';
@@ -43,6 +43,7 @@ function updateUser(db, user, opts, callback) {
     method: 'PUT',
     url: url,
     body: user,
+    headers: getBasicAuthHeaders(db),
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
 }
@@ -89,6 +90,7 @@ var getUser = toPromise(function (username, opts, callback) {
   var ajaxOpts = assign({
     method: 'GET',
     url: url + '/' + encodeURIComponent('org.couchdb.user:' + username),
+    headers: getBasicAuthHeaders(db),
   }, opts.ajax || {});
   ajaxCore(ajaxOpts, wrapError(callback));
 });
@@ -137,6 +139,7 @@ var deleteUser = toPromise(function (username, opts, callback) {
     var ajaxOpts = assign({
       method: 'DELETE',
       url: url,
+      headers: getBasicAuthHeaders(db),
     }, opts.ajax || {});
     ajaxCore(ajaxOpts, wrapError(callback));
   });
@@ -169,6 +172,7 @@ var changePassword = toPromise(function (username, password, opts, callback) {
     var ajaxOpts = assign({
       method: 'PUT',
       url: url,
+      headers: getBasicAuthHeaders(db),
       body: user,
     }, opts.ajax || {});
     ajaxCore(ajaxOpts, wrapError(callback));
@@ -193,6 +197,7 @@ var changeUsername = toPromise(function (oldUsername, newUsername, opts, callbac
     var updateOpts = assign({
       method: 'PUT',
       url: url,
+      headers: getBasicAuthHeaders(db),
       body: user,
     }, opts.ajax);
     return ajax(updateOpts);
diff --git a/src/utils.js b/src/utils.js
index 1f14161..5fcec2a 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -4,6 +4,8 @@ import urlJoin from 'url-join';
 import urlParse from 'url-parse';
 import inherits from 'inherits';
 
+import { btoa } from 'pouchdb-binary-utils';
+
 function getBaseUrl(db) {
   if (typeof db.getUrl === 'function') { // pouchdb pre-6.0.0
     return urlParse(db.getUrl()).origin;
@@ -26,6 +28,17 @@ function getSessionUrl(db) {
   return urlJoin(getBaseUrl(db), '/_session');
 }
 
+function getBasicAuthHeaders(db) {
+  var url = urlParse(db.name);
+  if (!url.auth) {
+    return {};
+  }
+
+  var str = url.username + ':' + url.password;
+  var token = btoa(unescape(encodeURIComponent(str)));
+  return {Authorization: 'Basic ' + token};
+}
+
 function wrapError(callback) {
   // provide more helpful error message
   return function (err, res) {
@@ -51,4 +64,4 @@ function AuthError(message) {
 
 inherits(AuthError, Error);
 
-export { AuthError, getConfigUrl, getSessionUrl, getUsersUrl, wrapError };
+export { AuthError, getBasicAuthHeaders, getConfigUrl, getSessionUrl, getUsersUrl, wrapError };
diff --git a/test/test.issue.109.js b/test/test.issue.109.js
index 5940da9..0b1de2c 100644
--- a/test/test.issue.109.js
+++ b/test/test.issue.109.js
@@ -24,6 +24,8 @@ describe('issue-109', function () {
       return db.deleteUser('spiderman');
     }).then(function () {
       return db.deleteAdmin('anna');
+    }).then(function () {
+      return db.logOut();
     });
   });
 
@@ -41,9 +43,9 @@ describe('issue-109', function () {
     });
   });
 
-  // Blocked by #109
-  it.skip('Test admin change user password with basic authentication', function () {
-    var dbWithBasicAuth = new PouchDB(dbName.replace('http://', 'http://anna:secret@'));
+  it('Test admin change user password with basic authentication', function () {
+    var dbNameWithAuth = dbName.replace('http://', 'http://anna:secret@');
+    var dbWithBasicAuth = new PouchDB(dbNameWithAuth, {skip_setup: true});
     return dbWithBasicAuth.changePassword('spiderman', 'will-remember').then(function (res) {
       res.ok.should.equal(true);
     }).then(function () {