diff --git a/pkgs/development/tools/ammonite/default.nix b/pkgs/development/tools/ammonite/default.nix
index 7804897bb819..9ae81e073df3 100644
--- a/pkgs/development/tools/ammonite/default.nix
+++ b/pkgs/development/tools/ammonite/default.nix
@@ -5,12 +5,12 @@
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "ammonite-${version}";
-  version = "1.6.2";
+  version = "1.6.3";
   scalaVersion = "2.12";
 
   src = fetchurl {
     url = "https://github.com/lihaoyi/Ammonite/releases/download/${version}/${scalaVersion}-${version}";
-    sha256 = "0am21zrnl48d397ll4pfsrgk079jb7x8z9kpfm6fz9hznrbl12hl";
+    sha256 = "0wdicgf41ysxcdly4hzpav52yhjx410c7c7nfbq87p0cqzywrbxd";
   };
 
   propagatedBuildInputs = [ jre ] ;