diff --git a/build.gradle b/build.gradle
index eba128e..9abef07 100644
--- a/build.gradle
+++ b/build.gradle
@@ -157,7 +157,9 @@ publishing {
 uploadArchives {
     repositories.mavenDeployer {
         repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
-            authentication(userName: ossrhUsername, password: ossrhPassword)
+            if (project.hasProperty('ossrhUsername') && project.hasProperty('ossrhPassword')) {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
         }
     }
 }