diff --git a/build-constraints.yaml b/build-constraints.yaml
index f723bb55..26e3c5bc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -12,7 +12,7 @@ packages:
     "Allan Lukwago <epicallan.al@gmail.com> @epicallan":
         - servant-errors
 
-        "Christian Charukiewicz <c.charukiewicz@gmail.com> @charukiewicz":
+    "Christian Charukiewicz <c.charukiewicz@gmail.com> @charukiewicz":
         - isbn
 
     "Koz Ross <koz.ross@retro-freedom.nz> @kozross":