diff --git a/lazy-lock.json b/lazy-lock.json
index 799f496..e5e8b5a 100644
--- a/lazy-lock.json
+++ b/lazy-lock.json
@@ -1,4 +1,10 @@
 {
+  "LuaSnip": { "branch": "master", "commit": "118263867197a111717b5f13d954cd1ab8124387" },
+  "cmp-buffer": { "branch": "main", "commit": "3022dbc9166796b644a841a02de8dd1cc1d311fa" },
+  "cmp-cmdline": { "branch": "main", "commit": "8ee981b4a91f536f52add291594e89fb6645e451" },
+  "cmp-nvim-lsp": { "branch": "main", "commit": "5af77f54de1b16c34b23cba810150689a3a90312" },
+  "cmp-path": { "branch": "main", "commit": "91ff86cd9c29299a64f968ebb45846c485725f23" },
+  "cmp_luasnip": { "branch": "master", "commit": "05a9ab28b53f71d1aece421ef32fee2cb857a843" },
   "crates.nvim": { "branch": "main", "commit": "8437522d12a8c523da2aee9db2979d070b2ecc33" },
   "fd": { "branch": "master", "commit": "00b64f3ccbfb832ef744bb42bbdfabaf929b5ee2" },
   "feline.nvim": { "branch": "main", "commit": "a6bebd903e84d5ce0e97c597e0ca85cd24109002" },
@@ -7,6 +13,7 @@
   "neo-tree.nvim": { "branch": "v3.x", "commit": "230ff118613fa07138ba579b89d13ec2201530b9" },
   "nui.nvim": { "branch": "main", "commit": "c9b4de623d19a85b353ff70d2ae9c77143abe69c" },
   "nvim": { "branch": "main", "commit": "079500a625f3ae5aa6efb758f1a17fe4c7a57e52" },
+  "nvim-cmp": { "branch": "main", "commit": "538e37ba87284942c1d76ed38dd497e54e65b891" },
   "nvim-lspconfig": { "branch": "master", "commit": "eb81c7ea08d6f01d5fa4cf09e58c708efadf9b2f" },
   "nvim-treesitter": { "branch": "master", "commit": "25ddfde8d7167d7d81403d6809242439037d2b68" },
   "nvim-web-devicons": { "branch": "master", "commit": "a1425903ab52a0a0460622519e827f224e5b4fee" },
diff --git a/lua/plugins/completions.lua b/lua/plugins/completions.lua
new file mode 100644
index 0000000..894c8f9
--- /dev/null
+++ b/lua/plugins/completions.lua
@@ -0,0 +1,68 @@
+return {
+    "hrsh7th/nvim-cmp",
+    lazy = false,
+    dependencies = {
+        -- base
+        "hrsh7th/cmp-nvim-lsp",
+        "hrsh7th/cmp-buffer",
+        "hrsh7th/cmp-path",
+        "hrsh7th/cmp-cmdline",
+        -- snippets
+        "L3MON4D3/LuaSnip",
+        "saadparwaiz1/cmp_luasnip",
+    },
+    config = function()
+        local cmp = require("cmp");
+
+        cmp.setup({
+            snippet = {
+                expand = function(args)
+                    require("luasnip").lsp_expand(args.body)
+                end,
+            },
+            window = {
+                completion = cmp.config.window.bordered(),
+                -- documentation = cmp.config.window.bordered(),
+            },
+            mapping = cmp.mapping.preset.insert({
+                ["<C-b>"] = cmp.mapping.scroll_docs(-4),
+                ["<C-f>"] = cmp.mapping.scroll_docs(4),
+                ["<C-Space>"] = cmp.mapping.complete(),
+                ["<C-e>"] = cmp.mapping.abort(),
+                ["<CR>"] = cmp.mapping.confirm({ select = true }),
+            }),
+            sources = cmp.config.sources({
+                { name = "nvim_lsp" },
+                { name = "luasnip" },
+            }, {
+                { name = "buffer" },
+            })
+        })
+
+        vim.api.nvim_create_autocmd("BufRead", {
+            group = vim.api.nvim_create_augroup("CmpSourceCargo", { clear = true }),
+            pattern = "Cargo.toml",
+            callback = function()
+                cmp.setup.buffer({ sources = { { name = "crates" } } })
+            end,
+        })
+
+        -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won"t work anymore).
+        cmp.setup.cmdline({ "/", "?" }, {
+            mapping = cmp.mapping.preset.cmdline(),
+            sources = {
+                { name = "buffer" }
+            }
+        })
+
+        -- Use cmdline & path source for ":" (if you enabled `native_menu`, this won"t work anymore).
+        cmp.setup.cmdline(":", {
+            mapping = cmp.mapping.preset.cmdline(),
+            sources = cmp.config.sources({
+                { name = "path" }
+            }, {
+                { name = "cmdline" }
+            })
+        })
+    end,
+}
diff --git a/lua/plugins/lsp.lua b/lua/plugins/lsp.lua
index 8784c48..89bfe1e 100644
--- a/lua/plugins/lsp.lua
+++ b/lua/plugins/lsp.lua
@@ -30,14 +30,24 @@ vim.api.nvim_create_autocmd('LspAttach', {
 return {
     {
         "neovim/nvim-lspconfig",
+        dependencies = {
+            "hrsh7th/cmp-nvim-lsp",
+        },
         config = function()
             local lspconfig = require("lspconfig")
 
-            lspconfig.pyright.setup({})
+            local capabilities = require("cmp_nvim_lsp").default_capabilities();
 
-            lspconfig.rust_analyzer.setup({})
+            lspconfig.pyright.setup({
+                capabilities = capabilities,
+            })
+
+            lspconfig.rust_analyzer.setup({
+                capabilities = capabilities,
+            })
 
             lspconfig.lua_ls.setup({
+                capabilities = capabilities,
                 settings = {
                     Lua = {
                         runtime = {
diff --git a/lua/plugins/snippets.lua b/lua/plugins/snippets.lua
new file mode 100644
index 0000000..9cd58a2
--- /dev/null
+++ b/lua/plugins/snippets.lua
@@ -0,0 +1,4 @@
+return {
+    "L3MON4D3/LuaSnip",
+    version = "v2.*",
+}