diff --git a/README.md b/README.md
index 879838a..a704ebe 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ sure whether you have this.
### Requirements
-Ddu.vim requires both Deno 1.38+ and denops.vim.
+Ddu.vim requires both Deno 1.40+ and denops.vim.
-
-
diff --git a/doc/ddu.txt b/doc/ddu.txt
index 6c4bcbe..25c52e7 100644
--- a/doc/ddu.txt
+++ b/doc/ddu.txt
@@ -67,7 +67,7 @@ INSTALL *ddu-install*
NOTE: ddu.vim requires Neovim (0.8.0+) or Vim 9.0.1276+ (latest is
recommended).
-Please install both Deno 1.38+ and "denops.vim".
+Please install both Deno 1.40+ and "denops.vim".
https://deno.land/
https://github.com/vim-denops/denops.vim
@@ -1607,6 +1607,9 @@ A: The example is here. >
==============================================================================
COMPATIBILITY *ddu-compatibility*
+2024.04.07
+* Deno 1.40+ is required.
+
2024.01.19
* Change "ddu#redraw()" interface.