diff --git a/ivy.xml b/ivy.xml
index 4153a8d..589e117 100644
--- a/ivy.xml
+++ b/ivy.xml
@@ -129,7 +129,7 @@
     <dependency org="redis.clients" name="jedis" rev="2.9.0"/>
     <dependency org="wsdl4j" name="wsdl4j" rev="1.6.3"/>
     <dependency org="xerces" name="xercesImpl" rev="2.9.1-patch-01"/>
-    <dependency org="zimbra" name="zm-ews-stub" rev="3.0"/>
+    <dependency org="zimbra" name="zm-ews-stub" rev="4.0"/>
     <dependency org="com.google.javascript" name="closure-compiler" rev="v20180204"/>
     <dependency org="com.github.zafarkhaja" name="java-semver" rev="0.9.0"/>
     <dependency org="io.jsonwebtoken" name="jjwt" rev="0.7.0" />
diff --git a/pkg-builder.pl b/pkg-builder.pl
index cd53b6c..514deee 100755
--- a/pkg-builder.pl
+++ b/pkg-builder.pl
@@ -219,7 +219,7 @@ ($)
         cpy_file("build/dist/yuicompressor-2.4.2-zimbra.jar",                       "$stage_base_dir/opt/zimbra/lib/jars/yuicompressor-2.4.2-zimbra.jar");
         cpy_file("build/dist/zkclient-0.1.0.jar",                                   "$stage_base_dir/opt/zimbra/lib/jars/zkclient-0.1.0.jar");
         cpy_file("build/dist/zookeeper-3.4.5.jar",                                  "$stage_base_dir/opt/zimbra/lib/jars/zookeeper-3.4.5.jar");
-        cpy_file("build/dist/zm-ews-stub-3.0.jar",                                  "$stage_base_dir/opt/zimbra/lib/jars/zm-ews-stub-3.0.jar");
+        cpy_file("build/dist/zm-ews-stub-3.0.jar",                                  "$stage_base_dir/opt/zimbra/lib/jars/zm-ews-stub-4.0.jar");
         cpy_file("build/dist/ehcache-3.1.2.jar",                                    "$stage_base_dir/opt/zimbra/lib/jars/ehcache-3.1.2.jar");
         cpy_file("build/dist/zimbra-charset.jar",                                   "$stage_base_dir/opt/zimbra/lib/jars/zimbra-charset.jar");
         cpy_file("build/dist/ant-1.6.5.jar",                                        "$stage_base_dir/opt/zimbra/lib/jars/ant-1.6.5.jar");