diff --git a/projects/amber-lang.com/package.yml b/projects/amber-lang.com/package.yml
index fe58b90c..0278027e 100644
--- a/projects/amber-lang.com/package.yml
+++ b/projects/amber-lang.com/package.yml
@@ -13,6 +13,9 @@ versions:
   github: Ph0enixKM/Amber
   strip: /-alpha/ # until there's a stable release
 
+companions:
+  gnu.org/bc: 1
+
 build:
   dependencies:
     rust-lang.org: '>=1.56'