diff --git a/README.md b/README.md
index 164d5fe..36304b5 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Extended increment/decrement plugin for [Neovim](https://github.com/neovim/neovi
 
 ## Installation
 
-`dial.nvim` requires Neovim `>=0.5.0` (`>=0.6.1` is recommended).
+`dial.nvim` requires Neovim `>=0.11.0`.
 You can install `dial.nvim` by following the instructions of your favorite package manager.
 
 ## Usage
diff --git a/README_ja.md b/README_ja.md
index 1974374..1a9c67f 100644
--- a/README_ja.md
+++ b/README_ja.md
@@ -41,8 +41,7 @@
 
 ## インストール
 
-本プラグインには Neovim 0.5.0 以上が必要です（Neovim 0.6.1 以降を推奨）。
-
+本プラグインには Neovim 0.11.0 以上が必要です。
 好きなパッケージマネージャの指示に従うことでインストールできます。
 
 ## 使用方法
diff --git a/doc/dial.jax b/doc/dial.jax
index 5f94054..e195ddf 100644
--- a/doc/dial.jax
+++ b/doc/dial.jax
@@ -39,7 +39,7 @@ Interface						|dial-interface|
 ==============================================================================
 REQUIREMENTS							*dial-requirements*
 
-* Neovim 0.6.1 or later（0.5.0 以降なら動くと考えられますが保証はしません）
+* Neovim 0.11.0 or later
 
 ==============================================================================
 INTRODUCTION							*dial-introduction*
diff --git a/doc/dial.txt b/doc/dial.txt
index c3f31e9..d69654a 100644
--- a/doc/dial.txt
+++ b/doc/dial.txt
@@ -40,8 +40,7 @@ Interface						|dial-interface|
 ==============================================================================
 REQUIREMENTS							*dial-requirements*
 
-* Neovim 0.6.1 or later
-  (0.5.0 or later will probably work, but not guaranteed)
+* Neovim 0.11.0 or later
 
 ==============================================================================
 INTRODUCTION							*dial-introduction*
diff --git a/lua/dial/util.lua b/lua/dial/util.lua
index 0acd16d..33fa81c 100644
--- a/lua/dial/util.lua
+++ b/lua/dial/util.lua
@@ -1,9 +1,6 @@
 -- utils
 local M = {}
 
--- NOTE: Needed until compatibility with Neovim 0.9 is dropped
-local islist = vim.fn.has('nvim-0.10') == 1 and vim.islist or vim.tbl_islist
-
 ---@generic T
 ---@param cond boolean
 ---@param branch_true T
@@ -41,7 +38,7 @@ end
 ---@param arg1 string | function
 ---@param arg2? string
 function M.validate_list(name, list, arg1, arg2)
-    if not islist(list) then
+    if not vim.islist(list) then
         error(("%s is not list."):format(name))
     end
 
@@ -163,7 +160,7 @@ end
 -- util.try_get_keys({foo = "bar", hoge = "fuga", teka = "pika"}, ["teka", "foo"])
 -- -> ["pika", "bar"]
 function M.try_get_keys(tbl, keylst)
-    if not islist(keylst) then
+    if not vim.islist(keylst) then
         return nil, "the 2nd argument is not list."
     end