diff --git a/Makefile b/Makefile
index 10fd0db1a..42ca8207a 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ webpack:
 	$(WEBPACK) --bail
 
 sync-s3:
-	$(S3CMD) sync -P --delete-removed --exclude '.DS_Store' --exclude '*.svg' --guess-mime-type ./build/ s3://$(S3_BUCKET_NAME)/
+	$(S3CMD) sync -P --delete-removed --exclude '.DS_Store' --exclude '*.svg' --guess-mime-type --no-mime-magic ./build/ s3://$(S3_BUCKET_NAME)/
 	$(S3CMD) sync -P --delete-removed --exclude '*' --include '*.svg' --mime-type 'image/svg+xml' ./build/ s3://$(S3_BUCKET_NAME)/
 
 sync-fastly: