diff --git a/packages/bookwyrm/package.nix b/packages/bookwyrm/package.nix
index 89059ec..859c11c 100644
--- a/packages/bookwyrm/package.nix
+++ b/packages/bookwyrm/package.nix
@@ -92,7 +92,7 @@ mkDerivation {
 		owner = "zedfrigg" ;
 		repo = "bookwyrm" ;
 		rev = "750b4c762c50222c641d9719460637eb836349ee" ;
-		hash = "" ;
+		hash = "sha256-HRNOtxaQm79lxdGQ3245xY7BulijcNWgXRNyTkEKJYY=" ;
 	} ;
 
 	dontPatch = true ;