diff --git a/build.gradle b/build.gradle
index 29c27b5..328d4de 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,5 +13,5 @@ repositories {
 }
 
 dependencies {
-    compile 'net.opacapp:libopac:5.2.5'
+    implementation 'net.opacapp:libopac:6.3.8'
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 37252ec..056e967 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Thu Apr 14 14:50:22 CEST 2016
+#Tue Mar 02 12:59:57 CET 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
diff --git a/src/main/java/net/opacapp/sample/libopacgradle/HelloOpac.java b/src/main/java/net/opacapp/sample/libopacgradle/HelloOpac.java
index 9bdf584..0a63aba 100644
--- a/src/main/java/net/opacapp/sample/libopacgradle/HelloOpac.java
+++ b/src/main/java/net/opacapp/sample/libopacgradle/HelloOpac.java
@@ -17,7 +17,7 @@
 public class HelloOpac {
 
     public static String LIBRARY_NAME = "Bremen";
-    public static String LIBRARY_CONFIG = "{\"account_supported\":true,\"api\":\"sisis\",\"city\":\"Bremen\",\"country\":\"Deutschland\",\"data\":{\"baseurl\":\"https://opac.stadtbibliothek-bremen.de/webOPACClient\"},\"geo\":[53.07929619999999,8.8016937],\"information\":\"http://www.stadtbibliothek-bremen.de/bibliotheken.php\",\"replacedby\":\"de.opacapp.bremen\",\"state\":\"Bremen\",\"title\":\"Stadtbibliothek\"}";
+    public static String LIBRARY_CONFIG = "{\"account_supported\":true,\"api\":\"sisis\",\"city\":\"Bremen\",\"country\":\"Deutschland\",\"data\":{\"baseurl\":\"https://opac.stabi-hb.de/webOPACClient\"},\"geo\":[53.07929619999999,8.8016937],\"information\":\"http://www.stadtbibliothek-bremen.de/bibliotheken.php\",\"replacedby\":\"de.opacapp.bremen\",\"state\":\"Bremen\",\"title\":\"Stadtbibliothek\"}";
 
     public static void main(final String[] args) throws JSONException, OpacApi.OpacErrorException, IOException {
         System.out.println("Hello OPAC!");
@@ -33,7 +33,7 @@ public static void main(final String[] args) throws JSONException, OpacApi.OpacE
         List<SearchField> searchFields = api.getSearchFields();
         System.out.println("Found a first search field: " + searchFields.get(0).getDisplayName());
 
-        List<SearchQuery> query = new ArrayList<SearchQuery>();
+        List<SearchQuery> query = new ArrayList<>();
         query.add(new SearchQuery(searchFields.get(0), "Hello"));
         System.out.println("Searching for 'hello' in this field...");