diff --git a/build.gradle b/build.gradle
index 76f904e9c..679c113e3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -74,7 +74,7 @@ startScripts {
     doLast {
         // increase default max heap size
         String var = 'DEFAULT_JVM_OPTS='
-        String args = '-Xmx1500M'
+        String args = '-Xmx1400M'
         unixScript.text = unixScript.text.replace(var + '""', var + '"' + args + '"')
         windowsScript.text = windowsScript.text.replace(var, var + args)
     }