diff --git a/pkgs/development/libraries/tl-expected/default.nix b/pkgs/development/libraries/tl-expected/default.nix
index c7cb92440ee..79af37f58e6 100644
--- a/pkgs/development/libraries/tl-expected/default.nix
+++ b/pkgs/development/libraries/tl-expected/default.nix
@@ -2,14 +2,14 @@
 
 stdenv.mkDerivation rec {
   pname = "tl-expected-unstable";
-  version = "2019-11-11"; # 5 commits ahead of version 1.0.0
+  version = "2023-02-15"; # 37 commits ahead of version 1.0.0
 
   src = fetchFromGitHub {
     owner = "TartanLlama";
     repo = "expected";
-    rev = "1d9c5d8c0da84b8ddc54bd3d90d632eec95c1f13";
+    rev = "9d812f5e3b5bc68023f6e31d29489cdcaacef606";
     fetchSubmodules = true;
-    sha256 = "0rzfn9yyg70zwpxbmv22qy0015baymi2rdd65ixmcb31fgnap68i";
+    hash = "sha256-ZokcGQgHH37nmTMLmxFcun4S1RjXuXb9NfWHet8Fbc4=";
   };
 
   nativeBuildInputs = [ cmake ];