diff --git a/netlify.toml b/netlify.toml
index 5b8a225..31081c5 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -2,4 +2,5 @@
   publish = "public"
   command = "npm run build"
 [build.environment]
+  YARN_VERSION = "1.3.2"
   YARN_FLAGS = "--no-ignore-optional"