diff --git a/packages/builder-web.0.2.0~dev/opam b/packages/builder-web.0.2.0~dev/opam
index d7bcfc5..f4db7d0 100644
--- a/packages/builder-web.0.2.0~dev/opam
+++ b/packages/builder-web.0.2.0~dev/opam
@@ -46,7 +46,7 @@ depends: [
   "uri"
   "fmt" {>= "0.8.7"}
   "cmarkit"
-  "tar"
+  "tar" {< "3.0.0"}
   "owee"
   "solo5-elftool" {>= "0.3.0"}
   "decompress"