diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index 4b8ae20e0f11..436bd5101233 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -330,6 +330,9 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
   - The `erlang_node_short_name`, `erlang_node_name`, `port` and `options` configuration parameters are gone, and have been replaced with an `environment` parameter.
     Use the appropriate [environment variables](https://hexdocs.pm/livebook/readme.html#environment-variables) inside `environment` to configure the service instead.
 
+- The `crystal` package has been updated to 1.11.x, which has some breaking changes.
+  Refer to crystal's changelog for more information. ([v1.10](https://github.com/crystal-lang/crystal/blob/master/CHANGELOG.md#1100-2023-10-09), [v1.11](https://github.com/crystal-lang/crystal/blob/master/CHANGELOG.md#1110-2024-01-08))
+
 ## Other Notable Changes {#sec-release-24.05-notable-changes}
 
 <!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->
diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index fb031eba18cb..f36ce4c25853 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -268,6 +268,16 @@ rec {
     };
   };
 
+  binaryCrystal_1_10 = genericBinary {
+    version = "1.10.1";
+    sha256s = {
+      x86_64-linux = "sha256-F0LjdV02U9G6B8ApHxClF/o5KvhxMNukSX7Z2CwSNIs=";
+      aarch64-darwin = "sha256-5kkObQl0VIO6zqQ8TYl0JzYyUmwfmPE9targpfwseSQ=";
+      x86_64-darwin = "sha256-5kkObQl0VIO6zqQ8TYl0JzYyUmwfmPE9targpfwseSQ=";
+      aarch64-linux = "sha256-AzFz+nrU/HJmCL1hbCKXf5ej/uypqV1GJPVLQ4J3778=";
+    };
+  };
+
   crystal_1_2 = generic {
     version = "1.2.2";
     sha256 = "sha256-nyOXhsutVBRdtJlJHe2dALl//BUXD1JeeQPgHU4SwiU=";
@@ -297,5 +307,12 @@ rec {
     llvmPackages = llvmPackages_15;
   };
 
-  crystal = crystal_1_9;
+  crystal_1_11 = generic {
+    version = "1.11.2";
+    sha256 = "sha256-BBEDWqFtmFUNj0kuGBzv71YHO3KjxV4d2ySTCD4HhLc=";
+    binary = binaryCrystal_1_10;
+    llvmPackages = llvmPackages_15;
+  };
+
+  crystal = crystal_1_11;
 }