diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index b182088..bcfacb2 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -362,7 +362,7 @@
   else:
     sign_name = output_name
 
-  cmd = ["java", "-Xmx512m", "-jar",
+  cmd = ["java", "-Xmx2048m", "-jar",
            os.path.join(OPTIONS.search_path, "framework", "signapk.jar")]
   if whole_file:
     cmd.append("-w")