diff --git a/init.lua b/init.lua
index eea85d2..79ff17d 100644
--- a/init.lua
+++ b/init.lua
@@ -5,8 +5,8 @@ vim.g.mapleader = " "
 local lazypath = vim.fn.stdpath "data" .. "/lazy/lazy.nvim"
 
 if not vim.uv.fs_stat(lazypath) then
-  local repo = "https://github.com/folke/lazy.nvim.git"
-  vim.fn.system { "git", "clone", "--filter=blob:none", repo, "--branch=stable", lazypath }
+    local repo = "https://github.com/folke/lazy.nvim.git"
+    vim.fn.system { "git", "clone", "--filter=blob:none", repo, "--branch=stable", lazypath }
 end
 
 vim.opt.rtp:prepend(lazypath)
@@ -15,15 +15,15 @@ local lazy_config = require "configs.lazy"
 
 -- load plugins
 require("lazy").setup({
-  {
-    "NvChad/NvChad",
-    lazy = false,
-    branch = "v2.5",
-    import = "nvchad.plugins",
-  },
+    {
+        "NvChad/NvChad",
+        lazy = false,
+        branch = "v2.5",
+        import = "nvchad.plugins",
+    },
 
-  { import = "plugins" },
-  { import = "custom.plugins" },
+    { import = "plugins" },
+    { import = "custom.plugins" },
 }, lazy_config)
 
 -- load theme
@@ -34,7 +34,5 @@ require "options"
 require "nvchad.autocmds"
 
 vim.schedule(function()
-  require "mappings"
+    require "mappings"
 end)
-
-local saga = "lspsaga"
diff --git a/lazy-lock.json b/lazy-lock.json
index cad6819..c819d1b 100644
--- a/lazy-lock.json
+++ b/lazy-lock.json
@@ -25,6 +25,7 @@
   "nui.nvim": { "branch": "main", "commit": "de740991c12411b663994b2860f1a4fd0937c130" },
   "nvim-autopairs": { "branch": "master", "commit": "23320e75953ac82e559c610bec5a90d9c6dfa743" },
   "nvim-cmp": { "branch": "main", "commit": "b5311ab3ed9c846b585c0c15b7559be131ec4be9" },
+  "nvim-dap": { "branch": "master", "commit": "a479e25ed5b5d331fb46ee4b9e160ff02ac64310" },
   "nvim-jdtls": { "branch": "master", "commit": "4d77ff02063cf88963d5cf10683ab1fd15d072de" },
   "nvim-lspconfig": { "branch": "master", "commit": "b0caeef0d835fbe19df6ad71dbc4345eaaea649c" },
   "nvim-tree.lua": { "branch": "master", "commit": "f0e9951778802526b14c934f7bf746e1e0ae5ed0" },
diff --git a/lua/chadrc.lua b/lua/chadrc.lua
index 53a542a..f3561aa 100644
--- a/lua/chadrc.lua
+++ b/lua/chadrc.lua
@@ -6,7 +6,7 @@
 local M = {}
 
 M.base46 = {
-  theme = "pastelDark",
+  theme = "radium",
 }
 
 return M
diff --git a/lua/configs/conform.lua b/lua/configs/conform.lua
index b466dd9..760421c 100644
--- a/lua/configs/conform.lua
+++ b/lua/configs/conform.lua
@@ -7,6 +7,7 @@ local options = {
         typescriptreact = { "prettier" },
         javascript = { "prettier" },
         javascriptreact = { "prettier" },
+        json = { "prettier" },
     },
 
     format_on_save = {
diff --git a/lua/configs/lspconfig.lua b/lua/configs/lspconfig.lua
index f2d9fa4..8cedf20 100644
--- a/lua/configs/lspconfig.lua
+++ b/lua/configs/lspconfig.lua
@@ -2,16 +2,17 @@
 require("nvchad.configs.lspconfig").defaults()
 
 local servers = {
-  html = {},
-  cssld = {},
-  clangd = {},
-  ts_ls = {},
-  dartls = {},
-  jdtls = {},
-  texlab = {},
+    html = {},
+    cssld = {},
+    clangd = {},
+    ts_ls = {},
+    jdtls = {},
+    texlab = {},
+    jsonls = {},
+    dartls = {},
 }
 
 for name, opts in pairs(servers) do
-  vim.lsp.enable(name)
-  vim.lsp.config(name, opts)
+    vim.lsp.enable(name)
+    vim.lsp.config(name, opts)
 end
diff --git a/lua/mappings.lua b/lua/mappings.lua
index e2d5d23..200bb50 100644
--- a/lua/mappings.lua
+++ b/lua/mappings.lua
@@ -20,3 +20,13 @@ end)
 map("t", "<C-t>", function()
     term.toggle()
 end)
+
+-- display full diagnostic message
+map("n", "<leader>dd", "<cmd>lua vim.diagnostic.open_float()<CR>")
+
+-- cancel snippets
+map(
+    { "i", "s" },
+    "<ESC>",
+    '<cmd>lua require("luasnip").session.current_nodes[vim.api.nvim_get_current_buf()] = nil<CR><ESC>'
+)
diff --git a/lua/plugins/init.lua b/lua/plugins/init.lua
index 7fb0a7b..4e10c01 100644
--- a/lua/plugins/init.lua
+++ b/lua/plugins/init.lua
@@ -1,48 +1,75 @@
 return {
 
-  -- config for formatters
-  {
-    "stevearc/conform.nvim",
-    event = "BufWritePre",
-    opts = require "configs.conform",
-  },
-
-  -- config for LSP
-  {
-    "neovim/nvim-lspconfig",
-    config = function()
-      require "configs.lspconfig"
-    end,
-  },
-
-  -- treesitter, to have highlighting
-  {
-    "nvim-treesitter/nvim-treesitter",
-    dependencies = { "OXY2DEV/markview.nvim" },
-    opts = {
-      ensure_installed = {
-        "vim",
-        "lua",
-        "vimdoc",
-        "html",
-        "css",
-        "tsx",
-        "typescript",
-        "dart",
-        "latex",
-      },
+    -- config for formatters
+    {
+        "stevearc/conform.nvim",
+        event = "BufWritePre",
+        opts = require "configs.conform",
     },
-  },
 
-  -- Tools for flutter
-  {
-    "akinsho/flutter-tools.nvim",
-    dependencies = {
-      "nvim-lua/plenary.nvim",
-      "stevearc/dressing.nvim",
+    -- config for LSP
+    {
+        "neovim/nvim-lspconfig",
+        config = function()
+            require "configs.lspconfig"
+        end,
     },
-    config = true,
-  },
 
-  { "ingur/floatty.nvim" },
+    -- treesitter, to have highlighting
+    {
+        "nvim-treesitter/nvim-treesitter",
+        dependencies = { "OXY2DEV/markview.nvim" },
+        opts = {
+            ensure_installed = {
+                "vim",
+                "lua",
+                "vimdoc",
+                "html",
+                "css",
+                "tsx",
+                "typescript",
+                "dart",
+                "latex",
+                "json",
+            },
+        },
+    },
+
+    -- Tools for flutter
+    {
+        "akinsho/flutter-tools.nvim",
+        dependencies = {
+            "nvim-lua/plenary.nvim",
+            "stevearc/dressing.nvim",
+        },
+        config = function()
+            require("flutter-tools").setup {}
+        end,
+    },
+
+    { "mfussenegger/nvim-dap" },
+
+    { "ingur/floatty.nvim" },
+
+    {
+        "L3MON4D3/LuaSnip",
+        even = "VaryLazy",
+        config = function()
+            local ls = require "luasnip"
+            ls.setup {
+                region_check_events = { "CursorHold", "InsertLeave" },
+                delete_check_events = { "TextChanged", "InsertEnter" },
+                history = false,
+            }
+            vim.keymap.del({ "i", "s" }, "<Tab>")
+
+            vim.keymap.set({ "i", "s" }, "<C-L>", function()
+                ls.jump(1)
+            end, { silent = true })
+
+            vim.keymap.set({ "i", "s" }, "<C-J>", function()
+                ls.jump(-1)
+            end, { silent = true })
+        end,
+    },
 }