diff --git a/hosts/main/home.nix b/hosts/main/home.nix
index e92974f..a03457c 100644
--- a/hosts/main/home.nix
+++ b/hosts/main/home.nix
@@ -74,6 +74,7 @@ in
 
   # File type associations
   xdg.mimeApps.defaultApplications = {
+    "application/epub+zip" = "calibre-ebook-viewer.desktop";
     "application/x-ptoptimizer-script" = "hugin.desktop";
     "x-scheme-handler/mailto" = "firefox.desktop";
   };