diff --git a/home/programs/graphical.nix b/home/programs/graphical.nix
index c295dc0..ccddb6a 100644
--- a/home/programs/graphical.nix
+++ b/home/programs/graphical.nix
@@ -39,6 +39,11 @@
     logseq
   ];
 
+  xdg.mimeApps.defaultApplications = {
+    "application/pdf" = "sioyek.desktop";
+  };
+  programs.sioyek.enable = true;
+
   programs.imv.enable = true;
 
   gtk = {