diff --git a/ethercat.nix b/ethercat.nix
index ae96c1d..dd5f733 100644
--- a/ethercat.nix
+++ b/ethercat.nix
@@ -13,7 +13,7 @@
 
 with pkgs;
 let
-  version="1.5";
+  version="master-ba278192";
   device_modules="generic";
 in
 stdenv.mkDerivation {
@@ -23,8 +23,8 @@ stdenv.mkDerivation {
 
   src = fetchGit {
     url = "https://gitlab.com/etherlab.org/ethercat.git";
-    ref = "stable-${version}";
-    rev = "c8a512ac077f2ab51bb072bfbef1a687f9f1c090";
+    ref = "master";
+    rev = "ba2781922162eca6c10c7cc72a7b4e52e3359f26";
     #ref = "refs/tags/1.9";
     #sha256 = lib.fakeSha256;
   };