diff --git a/home-manager/git.nix b/home-manager/git.nix
index 8a51dd0..e0446a4 100644
--- a/home-manager/git.nix
+++ b/home-manager/git.nix
@@ -22,6 +22,12 @@
         rebase.autostash = true;
         rerere.enabled = true;
         worktree.guessRemote = true;
+
+        diff.external = "difft --background light";
+        diff.tool = "difftastic";
+        difftool.prompt = false;
+        difftool.difftastic.cmd = "difft --background light \"$LOCAL\" \"$REMOTE\"";
+        pager.difftool = true;
       };
 
       aliases = {
diff --git a/home-mandlm.nix b/home-mandlm.nix
index b804b56..a3e07a2 100644
--- a/home-mandlm.nix
+++ b/home-mandlm.nix
@@ -26,6 +26,7 @@
       tree
       light
       element-desktop
+      difftastic
     ];
 
     stateVersion = "22.05";