diff --git a/config/nvim/init.lua b/config/nvim/init.lua
index c7a9185..120f003 100644
--- a/config/nvim/init.lua
+++ b/config/nvim/init.lua
@@ -48,6 +48,7 @@ add 'nvim-lua/plenary.nvim'
 add 'sindrets/diffview.nvim'
 add 'folke/which-key.nvim'
 add { source = 'saghen/blink.cmp', checkout = 'v1.8.0' }
+add { source = 'saghen/blink.compat', depends = { 'saghen/blink.cmp' } }
 add 'stevearc/conform.nvim'
 add 'coder/claudecode.nvim'
 add 'mbbill/undotree'
@@ -62,6 +63,7 @@ add 'nvim-treesitter/nvim-treesitter'
 add 'nvim-treesitter/nvim-treesitter-textobjects'
 add { source = 'nvim-pack/nvim-spectre', depends = { 'nvim-lua/plenary.nvim' } }
 add 'lervag/vimtex'
+add 'micangl/cmp-vimtex'
 
 -- color themes
 add 'EdenEast/nightfox.nvim'
@@ -504,12 +506,19 @@ later(function()
     },
     sources = {
       default = { 'lsp', 'path', 'snippets', 'buffer', 'copilot' },
+      per_filetype = {
+        tex = { 'vimtex', 'lsp', 'path', 'snippets', 'buffer', 'copilot' },
+      },
       providers = {
         copilot = {
           name = 'copilot',
           module = 'blink-copilot',
           async = true,
         },
+        vimtex = {
+          name = 'vimtex',
+          module = 'blink.compat.source',
+        },
       },
     },
     completion = {
diff --git a/config/nvim/lua/vimtex.lua b/config/nvim/lua/vimtex.lua
index 8cebe23..faf9ee6 100644
--- a/config/nvim/lua/vimtex.lua
+++ b/config/nvim/lua/vimtex.lua
@@ -13,7 +13,8 @@ function M.setup()
   -- Compiler settings
   vim.g.vimtex_compiler_method = 'latexmk'
   vim.g.vimtex_compiler_latexmk = {
-    build_dir = 'build',
+    aux_dir = 'build',
+    out_dir = 'build',
     callback = 1,
     continuous = 1,
     executable = 'latexmk',
@@ -25,6 +26,9 @@ function M.setup()
     },
   }
 
+  -- Auto-open viewer on compile
+  vim.g.vimtex_view_automatic = 1
+
   -- Quickfix settings
   vim.g.vimtex_quickfix_mode = 0 -- Don't open quickfix automatically
 
diff --git a/config/sioyek/prefs_user.config b/config/sioyek/prefs_user.config
index 029784f..984616d 100644
--- a/config/sioyek/prefs_user.config
+++ b/config/sioyek/prefs_user.config
@@ -35,9 +35,10 @@ page_separator_color            0.1569 0.2078 0.2431
 ui_background_color             0.0157 0.0824 0.1255
 ui_text_color                   0.7451 0.8118 0.8549
 
-# Startup - use custom color mode and enable synctex by default
+# Startup - enable synctex by default, start in white mode (toggle dark with C-r or C-i)
 should_launch_new_window        0
-startup_commands                toggle_custom_color;toggle_synctex
+# startup_commands                toggle_custom_color;toggle_synctex
+startup_commands                toggle_synctex
 
 # Smooth scrolling
 smooth_scroll_speed             3.0