diff --git a/build-constraints.yaml b/build-constraints.yaml
index 68070245..e33625ee 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -789,6 +789,7 @@ packages:
         - sdl2
 
     "Leon Mergen leon@solatis.com @solatis":
+        - base32string
         - base58string
         - bitcoin-api
         - bitcoin-api-extra