diff --git a/build/build.xml b/build/build.xml
index e1bc97c47..0e5381668 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -772,17 +772,21 @@
   </target>
 
   <target name="download-launch4j-windows">
-    <get src="http://switch.dl.sourceforge.net/project/launch4j/launch4j-3/3.0.2/launch4j-3.0.2-win32.zip" dest="windows" usetimestamp="true" skipexisting="true" verbose="true" />
-    <unzip dest="windows/launcher/" src="windows/launch4j-3.0.2-win32.zip" overwrite="true"/>
+    <antcall target="unzip">
+      <param name="archive_file" value="windows/launch4j-3.7-win32.zip"/>
+      <param name="archive_url" value="http://switch.dl.sourceforge.net/project/launch4j/launch4j-3/3.7/launch4j-3.7-win32.zip"/>
+      <param name="final_folder" value="windows/launcher/launch4j"/>
+      <param name="dest_folder" value="windows/launcher/"/>
+    </antcall>
   </target>
 
   <target name="download-launch4j-linux">
-    <get src="http://switch.dl.sourceforge.net/project/launch4j/launch4j-3/3.0.2/launch4j-3.0.2-linux.tgz" dest="windows" usetimestamp="true" skipexisting="true" verbose="true" />
-
-    <exec executable="tar" dir="windows/launcher">
-      <arg value="-xf"/>
-      <arg value="../launch4j-3.0.2-linux.tgz"/>
-    </exec>
+    <antcall target="untar">
+      <param name="archive_file" value="windows/launch4j-3.7-linux.tgz"/>
+      <param name="archive_url" value="http://switch.dl.sourceforge.net/project/launch4j/launch4j-3/3.7/launch4j-3.7-linux.tgz"/>
+      <param name="final_folder" value="windows/launcher/launch4j"/>
+      <param name="dest_folder" value="windows/launcher/"/>
+    </antcall>
   </target>
 
   <target name="windows-build"
@@ -844,6 +848,7 @@
       <param name="target.path" value="windows/work" />
     </antcall>
 
+    <delete dir="windows/launcher/launch4j"/>
     <antcall target="download-${launch4j-download-unpack-target-name}" />
 
     <property name="launch4j.dir" value="windows/launcher/launch4j/" />
diff --git a/build/windows/launch4j-3.7-linux.tgz.sha b/build/windows/launch4j-3.7-linux.tgz.sha
new file mode 100644
index 000000000..3879982ab
--- /dev/null
+++ b/build/windows/launch4j-3.7-linux.tgz.sha
@@ -0,0 +1 @@
+c9b873b5d011f46bfc840ea5e8adcd518b07cb11
diff --git a/build/windows/launch4j-3.7-win32.zip.sha b/build/windows/launch4j-3.7-win32.zip.sha
new file mode 100644
index 000000000..debcd625d
--- /dev/null
+++ b/build/windows/launch4j-3.7-win32.zip.sha
@@ -0,0 +1 @@
+7a3862f629b08ee4fc2177cefbbc6a317e034c16