diff --git a/neovim/lua/init.lua b/neovim/lua/init.lua
index 5cbb876..c259fc5 100644
--- a/neovim/lua/init.lua
+++ b/neovim/lua/init.lua
@@ -1,3 +1,7 @@
+if vim.fn.has("nvim-0.6.0") ~= 1 then
+    print("ERROR: Requires nvim >= 0.6.0")
+end
+
 local o = vim.o
 
 -- Helpers
diff --git a/neovim/lua/plugins.lua b/neovim/lua/plugins.lua
index 3ec0206..9282e30 100644
--- a/neovim/lua/plugins.lua
+++ b/neovim/lua/plugins.lua
@@ -28,7 +28,6 @@ packer.init({
         [">=0.8.0"] = "latest-0.8",
         [">=0.7.0"] = "latest-0.7",
         [">=0.6.0"] = "latest-0.6",
-        [">=0.5.0"] = "latest",
     }),
     snapshot_path = packer_util.join_paths(vim.fn.stdpath("config"), "packer_snapshots"),
     display = {
@@ -296,14 +295,12 @@ use({
     branch = utils.map_version_rule({
         [">=0.8.0"] = utils.nil_val,
         [">=0.7.0"] = "0.7-compat",
-        ["<0.7.0"] = utils.nil_val, -- use pinned commits
+        ["<0.7.0"] = utils.nil_val, -- use pinned commit
     }),
     commit = utils.map_version_rule({
         [">=0.8.0"] = utils.nil_val,
         [">=0.7.0"] = utils.nil_val, -- Use pinned branch
         [">=0.6.0"] = "4b403d2d724f48150ded41189ae4866492a8158b",
-        [">=0.5.1"] = "739a98c12bedaa2430c4a3c08d1d22ad6c16513e",
-        [">=0.5.0"] = "3e7390735501d0507bf2c2b5c2e7a16f58deeb81",
     }),
     requires = { "nvim-lua/plenary.nvim", "neovim/nvim-lspconfig" },
 })
@@ -333,7 +330,6 @@ use({
         [">=0.8.0"] = utils.nil_val,
         [">=0.7.0"] = "4cccb6f494eb255b32a290d37c35ca12584c74d0",
         [">=0.6.0"] = "bc25a6a5",
-        [">=0.5.0"] = "a189323454d1215c682c7ad7db3e6739d26339c4",
     }),
     config = function()
         require("utils").require_with_local("plugins.treesitter").setup()
diff --git a/neovim/lua/plugins/null-ls/init.lua b/neovim/lua/plugins/null-ls/init.lua
index 77b5512..7a239d6 100644
--- a/neovim/lua/plugins/null-ls/init.lua
+++ b/neovim/lua/plugins/null-ls/init.lua
@@ -48,6 +48,8 @@ function M.configure(options)
             null_ls.builtins.formatting.prettier,
             null_ls.builtins.formatting.trim_whitespace,
             null_ls.builtins.formatting.trim_newlines,
+            -- Ansible
+            null_ls.builtins.diagnostics.ansiblelint.with({ filetypes = { "yaml.ansible" } }),
             -- Fish
             null_ls.builtins.formatting.fish_indent,
             -- Python
@@ -59,6 +61,7 @@ function M.configure(options)
             -- Text
             null_ls.builtins.code_actions.proselint,
             null_ls.builtins.diagnostics.proselint,
+            null_ls.builtins.diagnostics.alex,
             null_ls.builtins.diagnostics.write_good.with({
                 extra_args = { "--no-adverb" },
                 diagnostics_postprocess = function(diagnostic)
@@ -74,33 +77,11 @@ function M.configure(options)
             null_ls.builtins.diagnostics.hadolint,
         }
 
-        -- HACK: Support for <0.6
-        if vim.fn.has("nvim-0.6.0") == 1 then
-            vim.list_extend(sources, {
-                -- Text
-                null_ls.builtins.diagnostics.alex,
-                -- Ansible
-                null_ls.builtins.diagnostics.ansiblelint.with({ filetypes = { "yaml.ansible" } }),
-            })
-        else
-            -- Sources I use added or modified after 0.5.0 compatability was broken
-            vim.list_extend(sources, {
-                require("plugins.null-ls.linters").alex,
-                require("plugins.null-ls.linters").ansiblelint,
-            })
-        end
-
         sources = disable_formatter_filetypes_for_existing_servers(sources, { "python", "lua" })
 
         -- Setup or configure null_ls
-        if null_ls["setup"] ~= nil then
-            options.sources = sources
-            null_ls.setup(options)
-        else
-            -- HACK: Handle old versions of null_ls for vim < 0.6 that don't support `setup`
-            null_ls.config({ sources = sources })
-            require("lspconfig")["null-ls"].setup(options)
-        end
+        options.sources = sources
+        null_ls.setup(options)
     end)
 end
 
diff --git a/neovim/lua/plugins/null-ls/linters.lua b/neovim/lua/plugins/null-ls/linters.lua
deleted file mode 100644
index bf1da46..0000000
--- a/neovim/lua/plugins/null-ls/linters.lua
+++ /dev/null
@@ -1,71 +0,0 @@
-local M = {}
-
-local null_ls = require("null-ls")
-local helpers = require("null-ls.helpers")
-
-M.alex = {
-    name = "alex",
-    method = null_ls.methods.DIAGNOSTICS,
-    filetypes = { "markdown" },
-    generator = null_ls.generator({
-        command = "alex",
-        args = { "--stdin", "--quiet" },
-        to_stdin = true,
-        from_stderr = true,
-        format = "line",
-        check_exit_code = function(code)
-            return code <= 1
-        end,
-        on_output = helpers.diagnostics.from_patterns({
-            {
-                pattern = [[ *(%d+):(%d+)-(%d+):(%d+) *(%w+) *(.+) +[%w]+ +([-%l]+)]],
-                groups = { "row", "col", "end_row", "end_col", "severity", "message", "code" },
-            },
-        }),
-    }),
-}
-
-M.ansiblelint = {
-    name = "ansiblelint",
-    method = null_ls.methods.DIAGNOSTICS,
-    filetypes = { "yaml.ansible" },
-    generator = null_ls.generator({
-        command = "ansible-lint",
-        to_stdin = true,
-        ignore_stderr = true,
-        args = { "-f", "codeclimate", "-q", "--nocolor", "$FILENAME" },
-        format = "json",
-        check_exit_code = function(code)
-            return code <= 2
-        end,
-        multiple_files = true,
-        on_output = function(params)
-            local severities = {
-                blocker = helpers.diagnostics.severities.error,
-                critical = helpers.diagnostics.severities.error,
-                major = helpers.diagnostics.severities.error,
-                minor = helpers.diagnostics.severities.warning,
-                info = helpers.diagnostics.severities.information,
-            }
-            params.messages = {}
-            for _, message in ipairs(params.output) do
-                local col = nil
-                local row = message.location.lines.begin
-                if type(row) == "table" then
-                    row = row.line
-                    col = row.column
-                end
-                table.insert(params.messages, {
-                    row = row,
-                    col = col,
-                    message = message.check_name,
-                    severity = severities[message.severity],
-                    filename = message.location.path,
-                })
-            end
-            return params.messages
-        end,
-    }),
-}
-
-return M