diff --git a/scripts/twine_upload.sh b/scripts/twine_upload.sh
index 68eddb907..b505a5bb5 100755
--- a/scripts/twine_upload.sh
+++ b/scripts/twine_upload.sh
@@ -41,5 +41,5 @@ done
 
 # Upload the distributions.
 for p in dist/* ; do
-  twine upload $p
+  twine upload --skip-existing $p
 done