diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 702a6ec37dbb..52557ca4a64a 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -335,6 +335,13 @@ rec {
     doCheck = false; # Some compiler spec problems on x86-64_linux with the .0 release
   };
 
+  crystal_1_15 = generic {
+    version = "1.15.1";
+    sha256 = "sha256-L/Q8yZdDq/wn4kJ+zpLfi4pxznAtgjxTCbLnEiCC2K0=";
+    binary = binaryCrystal_1_10;
+    llvmPackages = llvmPackages_18;
+    doCheck = false;
+  };
 
-  crystal = crystal_1_14;
+  crystal = crystal_1_15;
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2696cccdd966..a5745a474153 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5764,6 +5764,7 @@ with pkgs;
     crystal_1_11
     crystal_1_12
     crystal_1_14
+    crystal_1_15
     crystal;
 
   crystalline = callPackage ../development/tools/language-servers/crystalline {