diff --git a/netlify.toml b/netlify.toml
index 803b28f..7c93858 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -6,7 +6,7 @@
   command = "yarn build"
   publish = "dist"
 [build.environment]
-  YARN_VERSION = 0.27.5
+  YARN_VERSION = "0.27.5"
 
 [context.deploy-preview]
   command = "yarn build-preview"