diff --git a/emsdk b/emsdk
index ce1be52..644836d 100644
--- a/emsdk
+++ b/emsdk
@@ -617,8 +617,10 @@ def find_latest_sdk():
 def update_emsdk():
   if WINDOWS:
     download_and_unzip(urlparse.urljoin(emsdk_packages_url, 'emsdk_windows_update.zip'), emsdk_path(), download_even_if_exists=True)
+    rmfile('zips/emsdk_windows_update.zip')
   elif OSX:
     download_and_unzip(urlparse.urljoin(emsdk_packages_url, 'emsdk_osx_update.tar.gz'), emsdk_path(), download_even_if_exists=True)
+    rmfile('zips/emsdk_windows_update.tar.gz')
   else:
     print 'Unsupported OS, cannot update!'