diff --git a/configuration.nix b/configuration.nix
index a5cdd04..dd45f2c 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -111,6 +111,7 @@ with pkgs;
     ./modules/power.nix
     ./overlays/emacs.nix
     ./overlays/nix-direnv.nix
+    ./overlays/openconnect-sso.nix
   ];
 
 }
diff --git a/flake.nix b/flake.nix
index 5d72596..0f2becf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,10 @@
     agenix.url = "github:ryantm/agenix";
     agenix.inputs.nixpkgs.follows = "nixpkgs";
     emacs-overlay.url = "github:nix-community/emacs-overlay";
+    openconnect-sso = {
+      url = "github:vlaci/openconnect-sso";
+      flake = false;
+    };
   };
 
   outputs = { self, nixpkgs, agenix, ... }@inputs:
diff --git a/overlays/openconnect-sso.nix b/overlays/openconnect-sso.nix
new file mode 100644
index 0000000..574fcf9
--- /dev/null
+++ b/overlays/openconnect-sso.nix
@@ -0,0 +1,3 @@
+{ config, lib, pkgs, inputs, ... }: {
+  nixpkgs.overlays = [ inputs.openconnect-sso.overlay ];
+}