diff --git a/pkgs/top-level/ruby-packages.nix b/pkgs/top-level/ruby-packages.nix
index f5fbb3d223f7..cca66523737b 100644
--- a/pkgs/top-level/ruby-packages.nix
+++ b/pkgs/top-level/ruby-packages.nix
@@ -3150,10 +3150,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1hcwwr2h8jnqqxmf8mfb52b0dchr7pm064ingflb78wa00qhgk6m";
+      sha256 = "1d9safb4dly6qmc2g06444l0zifby52yy6j1a5fa1g4j3ihm3jah";
       type = "gem";
     };
-    version = "1.18.10";
+    version = "1.19.4";
   };
   observer = {
     groups = [ "default" ];