diff --git a/packages/preserves-nim/default.nix b/packages/preserves-nim/default.nix
index 9f94a90..b3cd38c 100644
--- a/packages/preserves-nim/default.nix
+++ b/packages/preserves-nim/default.nix
@@ -16,13 +16,13 @@ let
 
 in buildNimPackage rec {
   pname = "preserves";
-  version = "20230517";
+  version = "20230520";
   src = fetchFromGitea {
     domain = "git.syndicate-lang.org";
     owner = "ehmry";
     repo = "${pname}-nim";
     rev = version;
-    sha256 = "sha256-9rHpiTrpyH6nJPm1mlxwpv2G8dJilfUf0YRB6P8vYEM=";
+    sha256 = "sha256-X4h7AHCWvu/aaReTq3lO3gbHpb0fTrwdVGywXkb1PZQ=";
   };
 
   propagatedBuildInputs = [ compiler npeg ];