diff --git a/build.gradle b/build.gradle
index e859435d..845dca9f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
     repositories {
-        maven { url 'http://repo.spring.io/plugins-release' }
+        maven { url 'https://repo.spring.io/plugins-release' }
     }
     dependencies {
         classpath 'org.springframework.build.gradle:bundlor-plugin:0.1.2'