diff --git a/ivy.xml b/ivy.xml
index 1bb19e5..2e9d4d5 100644
--- a/ivy.xml
+++ b/ivy.xml
@@ -24,7 +24,10 @@
         <!-- http://search.maven.org/#artifactdetails%7Corg.bitbucket.b_c%7Cjose4j%7C0.4.4%7Cjar -->
         <dependency org="org.bitbucket.b_c" name="jose4j" rev="0.4.4" transitive="false" conf="default->default"/>
         <!-- https://mvnrepository.com/artifact/org.codehaus.groovy/groovy-all -->
-        <dependency org="org.codehaus.groovy" name="groovy-all" rev="1.8.8" transitive="false" conf="default->default"/>
+        <!-- https://mvnrepository.com/artifact/org.codehaus.groovy/groovy-all -->
+        <dependency org="org.codehaus.groovy" name="groovy-all" rev="3.0.9" transitive="false" conf="build->default"/>
+        <dependency org="org.codehaus.groovy" name="groovy-ant" rev="3.0.9" transitive="false" conf="build->default"/>
+        <dependency org="org.codehaus.groovy" name="groovy" rev="3.0.9" transitive="false" conf="build->default"/>
         <!-- http://search.maven.org/#artifactdetails%7Corg.bouncycastle%7Cbcpkix-jdk15on%7C1.54%7Cjar -->
         <dependency org="org.bouncycastle" name="bcpkix-jdk15on" rev="1.52" transitive="false" conf="default->default"/>
         <!-- http://search.maven.org/#artifactdetails%7Corg.bouncycastle%7Cbcprov-jdk15on%7C1.52%7Cjar -->
diff --git a/ivysettings.xml b/ivysettings.xml
new file mode 100644
index 0000000..10c8182
--- /dev/null
+++ b/ivysettings.xml
@@ -0,0 +1,17 @@
+<ivysettings>
+
+    <include url="${ivy.default.settings.dir}/ivysettings.xml"/>
+
+    <resolvers>
+
+        <ibiblio name="central" m2compatible="true"  root="https://repo.maven.apache.org/maven2/"/>
+
+        <chain name="external" returnFirst="true">
+            <resolver ref="default"/>
+            <resolver ref="central"/>
+        </chain>
+    </resolvers>
+
+    <settings defaultResolver="external"/>
+
+</ivysettings>