diff --git a/gradle.properties b/gradle.properties
index d5e9c70..2cff51d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group = org.xbib
 name = z3950
-version = 5.1.1
+version = 5.1.2
 
 org.gradle.warning.mode = ALL
diff --git a/settings.gradle b/settings.gradle
index e547f33..107d5f4 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -25,7 +25,7 @@ dependencyResolutionManagement {
             library('groovy-macro', 'org.apache.groovy', 'groovy-macro').versionRef('groovy')
             library('groovy-templates', 'org.apache.groovy', 'groovy-templates').versionRef('groovy')
             library('groovy-test', 'org.apache.groovy', 'groovy-test').versionRef('groovy')
-            library('marc', 'org.xbib', 'marc').version('2.9.15')
+            library('marc', 'org.xbib', 'marc').version('2.9.21')
         }
     }
 }