diff --git a/src/index.js b/src/index.js
index 0f54d7db..84800dda 100644
--- a/src/index.js
+++ b/src/index.js
@@ -65,7 +65,7 @@ npmconf.load({}, (err, conf) => {
           token: env.NPM_TOKEN
         },
         loglevel: log.level,
-        registry
+        registry: registry + (registry[registry.length - 1] !== '/' ? '/' : '')
       },
       plugins,
       (err, release) => {
diff --git a/src/lib/last-release.js b/src/lib/last-release.js
index fb5dd30e..3ce31022 100644
--- a/src/lib/last-release.js
+++ b/src/lib/last-release.js
@@ -5,7 +5,7 @@ module.exports = function (pkg, npmConfig, cb) {
   npmlog.level = npmConfig.loglevel || 'error'
   const client = new RegClient({log: npmlog})
 
-  client.get(`${npmConfig.registry}/${pkg.name}`, {
+  client.get(`${npmConfig.registry}${pkg.name}`, {
     auth: npmConfig.auth
   }, (err, data) => {
     if (err && err.statusCode === 404) return cb(null, {})
diff --git a/test/specs/last-release.js b/test/specs/last-release.js
index 68f56ad3..008894c8 100644
--- a/test/specs/last-release.js
+++ b/test/specs/last-release.js
@@ -4,7 +4,7 @@ require('../mocks/registry')
 const lastRelease = require('../../dist/lib/last-release')
 
 const npmConfig = {
-  registry: 'http://registry.npmjs.org'
+  registry: 'http://registry.npmjs.org/'
 }
 
 test('last release from registry', (t) => {
diff --git a/test/specs/pre.js b/test/specs/pre.js
index 64feea76..55c1cc87 100644
--- a/test/specs/pre.js
+++ b/test/specs/pre.js
@@ -18,7 +18,7 @@ test('full pre run', (t) => {
     pre({
       name: 'available'
     }, {
-      registry: 'http://registry.npmjs.org'
+      registry: 'http://registry.npmjs.org/'
     },
     plugins,
     (err, release) => {
@@ -34,7 +34,7 @@ test('full pre run', (t) => {
     pre({
       name: 'unavailable'
     }, {
-      registry: 'http://registry.npmjs.org'
+      registry: 'http://registry.npmjs.org/'
     },
     plugins,
     (err, release) => {