diff --git a/init.lua b/init.lua
index ce2b511..b6ce6eb 100644
--- a/init.lua
+++ b/init.lua
@@ -1,7 +1,8 @@
 
+require( "roka.core.options"    )
+require( "roka.core.keymaps"    )
+require( "roka.core.plugins"    )
 
-require( "roka.core.options")
-require( "roka.core.keymaps")
-require( "roka.core.plugins")
-
-require( "roka.plug.color"  )
\ No newline at end of file
+require( "roka.plug.color"      )
+require( "roka.plug.mason"      )
+require( "roka.plug.rust-tools" )
diff --git a/lua/roka/core/plugins.lua b/lua/roka/core/plugins.lua
index ea2ca31..a94cd1c 100644
--- a/lua/roka/core/plugins.lua
+++ b/lua/roka/core/plugins.lua
@@ -62,6 +62,19 @@ return packer.startup(function(use)
     use "wbthomason/packer.nvim"
 
 
+    -- ----------------------------------------------------
+    -- plugin to install and manage LSP servers
+    -- ----------------------------------------------------
+    use "williamboman/mason.nvim"
+    use "williamboman/mason-lspconfig.nvim"
+
+    -- ----------------------------------------------------
+    -- attaching neovim to rust-analyzer
+    -- ----------------------------------------------------
+    use "neovim/nvim-lspconfig"
+    use "simrat39/rust-tools.nvim"
+
+
     use "lewis6991/impatient.nvim"
 
     -- ----------------------------------------------------
@@ -104,7 +117,7 @@ return packer.startup(function(use)
         end
     }
 
- -- ----------------------------------------------------
+    -- ----------------------------------------------------
     -- nvim-tree
     -- ----------------------------------------------------
     use { 
@@ -115,25 +128,25 @@ return packer.startup(function(use)
         end
     }
 
-     -- --------------------------------------------------------------
+    -- --------------------------------------------------------------
     -- autocompletion
     -- --------------------------------------------------------------
-    use {
-        "hrsh7th/nvim-cmp",
-
-        requires = {
-            "hrsh7th/cmp-nvim-lsp",
-            "hrsh7th/cmp-nvim-lua",
-            "hrsh7th/cmp-buffer",
-            "hrsh7th/cmp-path",
-            "hrsh7th/cmp-calc",
-            "saadparwaiz1/cmp_luasnip",
-        },
-
-        config = function()
-            require( "roka.plug.nvim-cmp")
-        end
-    }
+--    use {
+--        "hrsh7th/nvim-cmp",
+--
+--        requires = {
+--            "hrsh7th/cmp-nvim-lsp",
+--            "hrsh7th/cmp-nvim-lua",
+--            "hrsh7th/cmp-buffer",
+--            "hrsh7th/cmp-path",
+--            "hrsh7th/cmp-calc",
+--            "saadparwaiz1/cmp_luasnip",
+--        },
+--
+--        config = function()
+--            require( "roka.plug.nvim-cmp")
+--        end
+--    }
     
     -- --------------------------------------------------------------
     -- autocompletion/snippets
@@ -143,6 +156,39 @@ return packer.startup(function(use)
         "rafamadriz/friendly-snippets", -- Optional
     }
 
+    -- --------------------------------------------------------------
+    -- treesitter
+    -- --------------------------------------------------------------
+    use {
+        "nvim-treesitter/nvim-treesitter",
+        run = function()
+            local ts_update = require('nvim-treesitter.install').update({ with_sync = true})
+            ts_update()
+        end,
+
+        build = ":TSUpdate",
+
+        config = function()
+            require'nvim-treesitter.configs'.setup {
+                ensure_installed = {"c", "lua", "vim", "vimdoc", "query", "markdown", "markdown_inline", "rust"},
+                auto_install = false,
+                highlight = {
+                    enable = true,
+                    disable= function( lang, buf)
+                        local max_filesize = 100 * 1024
+                        local ok, stats = pcall( vim.loop.fs_stat, vim.api.nvim_buf_get_name(buf))
+
+                        if ok and stats and stats.size > max_filesize then
+                            return true
+                        end
+                    end,
+
+                    additional_vim_regex_highlighting = false,
+                },
+            }
+        end,
+    }
+
     -- -------------------------------------------------------------------
     -- Automatically set up your configuration after cloning packer.nvim.
     -- Put this at the end after all plugins.
diff --git a/lua/roka/plug/mason.lua b/lua/roka/plug/mason.lua
new file mode 100644
index 0000000..e8066b9
--- /dev/null
+++ b/lua/roka/plug/mason.lua
@@ -0,0 +1,17 @@
+local status, mason= pcall(require, "mason")
+if not status then
+    return
+end
+
+mason.setup({
+    ui = {
+        icons = {
+            package_installed = "",
+            package_pending = "",
+            package_uninstalled = "",
+        },
+    },
+})
+
+require("mason-lspconfig").setup()
+
diff --git a/lua/roka/plug/rust-tools.lua b/lua/roka/plug/rust-tools.lua
new file mode 100644
index 0000000..dc4554e
--- /dev/null
+++ b/lua/roka/plug/rust-tools.lua
@@ -0,0 +1,15 @@
+local status, rt = pcall(require, "rust-tools")
+if not status then
+    return
+end
+
+rt.setup({
+  server = {
+    on_attach = function(_, bufnr)
+      -- Hover actions
+      vim.keymap.set("n", "<C-space>", rt.hover_actions.hover_actions, { buffer = bufnr })
+      -- Code action groups
+      vim.keymap.set("n", "<Leader>a", rt.code_action_group.code_action_group, { buffer = bufnr })
+    end,
+  },
+})