diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index d828431f842..723a4978234 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -212,10 +212,10 @@ let
 
 in {
   ruby_2_4 = generic {
-    version = rubyVersion "2" "4" "7" "";
+    version = rubyVersion "2" "4" "9" "";
     sha256 = {
-      src = "12cbyf7zai8mi3mxffm5ynq3mmkcbvs7kb1bbrs259m61irgqvnd";
-      git = "1dgch9xz4wdcncb6pf2dvijm10yk6mbw2wfdrj7d3wazrjzh305z";
+      src = "1bn6n5b920qy3lsx99jr8495jkc3sg89swgb96d5fgd579g6p6zr";
+      git = "066kb1iki7mx7qkm10xhj5b6v8s47wg68v43l3nc36y2hyim1w2c";
     };
   };
 
diff --git a/pkgs/development/interpreters/ruby/patchsets.nix b/pkgs/development/interpreters/ruby/patchsets.nix
index 317fe771b79..6fbb33b27fc 100644
--- a/pkgs/development/interpreters/ruby/patchsets.nix
+++ b/pkgs/development/interpreters/ruby/patchsets.nix
@@ -1,7 +1,7 @@
 { patchSet, useRailsExpress, ops, patchLevel, fetchpatch }:
 
 {
-  "2.4.7" = ops useRailsExpress [
+  "2.4.9" = ops useRailsExpress [
     "${patchSet}/patches/ruby/2.4/head/railsexpress/01-skip-broken-tests.patch"
     "${patchSet}/patches/ruby/2.4/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.4/head/railsexpress/03-display-more-detailed-stack-trace.patch"