diff --git a/gradle.properties b/gradle.properties
index b5b8079..335f15f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,8 +1,8 @@
 group = org.xbib
 name = z3950
-version = 2.2.3
+version = 2.3.0
 
 gradle.wrapper.version = 6.6.1
-netty.version = 4.1.52.Final
-xbib-cql.version = 3.0.4
-xbib-bibliographic-character-sets.version = 2.0.0
\ No newline at end of file
+netty.version = 4.1.65.Final
+xbib-cql.version = 3.1.0
+xbib-bibliographic-character-sets.version = 2.0.0
diff --git a/gradle/publishing/publication.gradle b/gradle/publishing/publication.gradle
index c35fcb9..2e2b2c0 100644
--- a/gradle/publishing/publication.gradle
+++ b/gradle/publishing/publication.gradle
@@ -53,12 +53,14 @@ if (project.hasProperty("signing.keyId")) {
     }
 }
 
-nexusPublishing {
-    repositories {
-        sonatype {
-            username = project.property('ossrhUsername')
-            password = project.property('ossrhPassword')
-            packageGroup = "org.xbib"
+if (project.hasProperty("ossrhUsername")) {
+    nexusPublishing {
+        repositories {
+            sonatype {
+                username = project.property('ossrhUsername')
+                password = project.property('ossrhPassword')
+                packageGroup = "org.xbib"
+            }
         }
     }
 }
diff --git a/gradle/repositories/maven.gradle b/gradle/repositories/maven.gradle
new file mode 100644
index 0000000..ec58acb
--- /dev/null
+++ b/gradle/repositories/maven.gradle
@@ -0,0 +1,4 @@
+repositories {
+    mavenLocal()
+    mavenCentral()
+}