diff --git a/pkgs/development/libraries/libsignon-glib/default.nix b/pkgs/development/libraries/libsignon-glib/default.nix
index db2b468bb3a..2e5162dda00 100644
--- a/pkgs/development/libraries/libsignon-glib/default.nix
+++ b/pkgs/development/libraries/libsignon-glib/default.nix
@@ -2,15 +2,15 @@
 
 stdenv.mkDerivation rec {
   pname = "libsignon-glib";
-  version = "unstable-2018-10-24";
+  version = "2.1";
 
   outputs = [ "out" "dev" "devdoc" "py" ];
 
   src = fetchgit {
     url = "https://gitlab.com/accounts-sso/${pname}";
-    rev = "3639a2e90447e4640a03a44972560afe8f61aa48";
+    rev = "refs/tags/${version}";
+    sha256 = "0gnx9gqsh0hcfm1lk7w60g64mkn1iicga5f5xcy1j9a9byacsfd0";
     fetchSubmodules = true;
-    sha256 = "1cq19zbsx4c57dc5gp3shp8lzcr1hw2ynylpn1nkvfyyrx80m60w";
   };
 
   nativeBuildInputs = [