diff --git a/after/syntax/diff.vim b/after/syntax/diff.vim
new file mode 100644
index 0000000..ff38047
--- /dev/null
+++ b/after/syntax/diff.vim
@@ -0,0 +1,9 @@
+" Change diff highlight groups
+hi default diffBold term=bold cterm=bold gui=bold
+hi link diffType diffBold
+hi link diffFile diffBold
+hi link diffSubname None
+hi link diffNewFile diffBold
+hi link diffAdded DiffAdd
+hi link diffRemoved DiffDelete
+syn match diffBold "^index\s\w\+\.\.\w\+\s\w\+$"