diff --git a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/artifactory/ArtifactoryService.java b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/artifactory/ArtifactoryService.java
index d8d0071723..370f345f79 100644
--- a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/artifactory/ArtifactoryService.java
+++ b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/artifactory/ArtifactoryService.java
@@ -30,6 +30,7 @@ import org.springframework.http.MediaType;
 import org.springframework.http.RequestEntity;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
@@ -53,19 +54,18 @@ public class ArtifactoryService {
 
 	private final RestTemplate restTemplate;
 
-	private final ArtifactoryProperties artifactoryProperties;
-
 	private final BintrayService bintrayService;
 
 	private static final ConsoleLogger console = new ConsoleLogger();
 
 	public ArtifactoryService(RestTemplateBuilder builder, ArtifactoryProperties artifactoryProperties,
 			BintrayService bintrayService) {
-		this.artifactoryProperties = artifactoryProperties;
 		this.bintrayService = bintrayService;
 		String username = artifactoryProperties.getUsername();
 		String password = artifactoryProperties.getPassword();
-		builder = builder.basicAuthentication(username, password);
+		if (StringUtils.hasLength(username)) {
+			builder = builder.basicAuthentication(username, password);
+		}
 		this.restTemplate = builder.build();
 	}
 
diff --git a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/bintray/BintrayService.java b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/bintray/BintrayService.java
index c5b38b74bb..2cc1fe779e 100644
--- a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/bintray/BintrayService.java
+++ b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/bintray/BintrayService.java
@@ -31,6 +31,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.RequestEntity;
 import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
@@ -65,7 +66,9 @@ public class BintrayService {
 		this.sonatypeService = sonatypeService;
 		String username = bintrayProperties.getUsername();
 		String apiKey = bintrayProperties.getApiKey();
-		builder = builder.basicAuthentication(username, apiKey);
+		if (StringUtils.hasLength(username)) {
+			builder = builder.basicAuthentication(username, apiKey);
+		}
 		this.restTemplate = builder.build();
 	}
 
diff --git a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/sonatype/SonatypeService.java b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/sonatype/SonatypeService.java
index 61a4f3e26d..ce2ff317d2 100644
--- a/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/sonatype/SonatypeService.java
+++ b/ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/sonatype/SonatypeService.java
@@ -23,6 +23,7 @@ import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
@@ -38,15 +39,14 @@ public class SonatypeService {
 
 	private final RestTemplate restTemplate;
 
-	private final SonatypeProperties sonatypeProperties;
-
 	private static final ConsoleLogger console = new ConsoleLogger();
 
 	public SonatypeService(RestTemplateBuilder builder, SonatypeProperties sonatypeProperties) {
-		this.sonatypeProperties = sonatypeProperties;
 		String username = sonatypeProperties.getUserToken();
-		String apiKey = sonatypeProperties.getPasswordToken();
-		builder = builder.basicAuthentication(username, apiKey);
+		String password = sonatypeProperties.getPasswordToken();
+		if (StringUtils.hasLength(username)) {
+			builder = builder.basicAuthentication(username, password);
+		}
 		this.restTemplate = builder.build();
 	}