diff --git a/pkgs/development/interpreters/janet/default.nix b/pkgs/development/interpreters/janet/default.nix
index 337b83767f4e..be5da812530d 100644
--- a/pkgs/development/interpreters/janet/default.nix
+++ b/pkgs/development/interpreters/janet/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "janet";
-  version = "1.4.0";
+  version = "1.5.1";
 
   src = fetchFromGitHub {
     owner = "janet-lang";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0xszmgw5nl5b6gd3344h1mic1c1a3hj7nivp4d9hqzzh131qvbn5";
+    sha256 = "13b4haaanlgi8qpwwvf59zf7qsw8p0zdqv7xdxjjyid5yww7jmm2";
   };
 
   nativeBuildInputs = [ meson ninja ];