diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 82d39160fc1e..dcb586405faa 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -318,8 +318,8 @@ rec {
   };
 
   crystal_1_16 = generic {
-    version = "1.16.1";
-    sha256 = "sha256-kbcr1t4ZskCgDdejDNYzYB/x4HLQk4Xoun9KvIW7FKc=";
+    version = "1.16.3";
+    sha256 = "sha256-U9H1tHUMyDNicZnXzEccDki5bGXdV0B2Wu2PyCksPVI=";
     binary = binaryCrystal_1_10;
     llvmPackages = llvmPackages_18;
     doCheck = false;