diff --git a/pom.xml b/pom.xml
index 1c5a3cf..d1edf3c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.1.3</version>
+        <version>3.2.2</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>no.elixir.fega</groupId>
@@ -15,7 +15,7 @@
     <description>LocalEGA TSD Proxy</description>
 
     <properties>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
     </properties>
 
     <dependencies>
diff --git a/src/main/java/no/elixir/fega/ltp/LocalEGATSDProxyApplication.java b/src/main/java/no/elixir/fega/ltp/LocalEGATSDProxyApplication.java
index c329162..926d050 100644
--- a/src/main/java/no/elixir/fega/ltp/LocalEGATSDProxyApplication.java
+++ b/src/main/java/no/elixir/fega/ltp/LocalEGATSDProxyApplication.java
@@ -113,7 +113,7 @@ public TSDFileAPIClient tsdFileAPIClient(@Value("${tsd.host}") String tsdHost,
                 .host(tsdHost)
                 .project(tsdProject)
                 .accessKey(tsdAccessKey);
-        if (!StringUtils.isEmpty(tsdRootCA) && !StringUtils.isEmpty(tsdRootCAPassword)) {
+        if (StringUtils.hasLength(tsdRootCA) && StringUtils.hasLength(tsdRootCAPassword)) {
             X509TrustManager trustManager = trustManagerForCertificates(Files.newInputStream(Path.of(tsdRootCA)), tsdRootCAPassword);
             SSLContext sslContext = SSLContext.getInstance("TLS");
             sslContext.init(null, new TrustManager[]{trustManager}, null);
diff --git a/src/main/java/no/elixir/fega/ltp/authentication/CEGACredentialsProvider.java b/src/main/java/no/elixir/fega/ltp/authentication/CEGACredentialsProvider.java
index cab9dee..fccca69 100644
--- a/src/main/java/no/elixir/fega/ltp/authentication/CEGACredentialsProvider.java
+++ b/src/main/java/no/elixir/fega/ltp/authentication/CEGACredentialsProvider.java
@@ -12,6 +12,7 @@
 import org.springframework.web.client.RestTemplate;
 
 import java.net.MalformedURLException;
+import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.Base64;
@@ -45,7 +46,7 @@ public class CEGACredentialsProvider {
      */
     @Cacheable("cega-credentials")
     public Credentials getCredentials(String username) throws MalformedURLException, URISyntaxException {
-        URL url = new URL(String.format(cegaAuthURL + "%s?idType=username", username));
+        URL url = new URI(String.format(cegaAuthURL + "%s?idType=username", username)).toURL();
         org.springframework.http.HttpHeaders headers = new org.springframework.http.HttpHeaders();
         headers.set(HttpHeaders.AUTHORIZATION, "Basic " + Base64.getEncoder().encodeToString((cegaUsername + ":" + cegaPassword).getBytes()));
         ResponseEntity<Credentials> response = restTemplate.exchange(url.toURI(), HttpMethod.GET,
diff --git a/src/main/java/no/elixir/fega/ltp/controllers/rest/ProxyController.java b/src/main/java/no/elixir/fega/ltp/controllers/rest/ProxyController.java
index c71f9fa..667d8cf 100644
--- a/src/main/java/no/elixir/fega/ltp/controllers/rest/ProxyController.java
+++ b/src/main/java/no/elixir/fega/ltp/controllers/rest/ProxyController.java
@@ -60,7 +60,7 @@ public ResponseEntity<?> stream(InputStream inputStream,
         byte[] chunkBytes = inputStream.readAllBytes();
 
         // new upload
-        if (StringUtils.isEmpty(uploadId)) {
+        if (!StringUtils.hasLength(uploadId)) {
             Chunk response = tsdFileAPIClient.initializeResumableUpload(token.getToken(), tsdAppId, chunkBytes, fileName);
             return validateChunkChecksum(token, response, md5);
         }
@@ -133,7 +133,7 @@ public ResponseEntity<?> deleteFile(@RequestHeader(HttpHeaders.PROXY_AUTHORIZATI
     public ResponseEntity<?> getResumables(@RequestHeader(HttpHeaders.PROXY_AUTHORIZATION) String bearerAuthorization,
                                            @RequestParam(value = "uploadId", required = false) String uploadId) {
         Token token = tsdFileAPIClient.getToken(TOKEN_TYPE, TOKEN_TYPE, getElixirAAIToken(bearerAuthorization));
-        if (StringUtils.isEmpty(uploadId)) {
+        if (!StringUtils.hasLength(uploadId)) {
             return ResponseEntity.ok(tsdFileAPIClient.listResumableUploads(token.getToken(), tsdAppId));
         } else {
             return ResponseEntity.ok(tsdFileAPIClient.getResumableUpload(token.getToken(), tsdAppId, uploadId));