diff --git a/packages/glpk/meta.yaml b/packages/glpk/meta.yaml
index c344a52eb..68a21d4f6 100644
--- a/packages/glpk/meta.yaml
+++ b/packages/glpk/meta.yaml
@@ -1,6 +1,6 @@
 package:
   name: glpk
-  version: 4.65
+  version: "4.65"
 
 source:
   sha256: 4281e29b628864dfe48d393a7bedd781e5b475387c20d8b0158f329994721a10