diff --git a/README.md b/README.md
index b103a24..219ecda 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ whether you have this.
 
 ### Requirements
 
-Ddc.vim requires both Deno and denops.vim.
+Ddc.vim requires both Deno 1.42+ and denops.vim.
 
 - <https://deno.land/>
 - <https://github.com/vim-denops/denops.vim>
diff --git a/denops/ddc/deps.ts b/denops/ddc/deps.ts
index d924491..25b864c 100644
--- a/denops/ddc/deps.ts
+++ b/denops/ddc/deps.ts
@@ -12,20 +12,20 @@ export * as vimOp from "https://deno.land/x/denops_std@v6.4.0/option/vim/mod.ts"
 export * as fn from "https://deno.land/x/denops_std@v6.4.0/function/mod.ts";
 export * as vars from "https://deno.land/x/denops_std@v6.4.0/variable/mod.ts";
 export * as autocmd from "https://deno.land/x/denops_std@v6.4.0/autocmd/mod.ts";
-export * as base64 from "https://deno.land/std@0.222.1/encoding/base64.ts";
+export * as base64 from "https://deno.land/std@0.224.0/encoding/base64.ts";
 export {
   assertEquals,
   equal,
-} from "https://deno.land/std@0.222.1/assert/mod.ts";
+} from "https://deno.land/std@0.224.0/assert/mod.ts";
 export {
   basename,
   parse,
   toFileUrl,
-} from "https://deno.land/std@0.222.1/path/mod.ts";
+} from "https://deno.land/std@0.224.0/path/mod.ts";
 export {
   deadline,
   DeadlineError,
-} from "https://deno.land/std@0.222.1/async/mod.ts";
+} from "https://deno.land/std@0.224.0/async/mod.ts";
 export { TimeoutError } from "https://deno.land/x/msgpack_rpc@v4.0.1/response_waiter.ts";
 export { spy } from "https://deno.land/x/mock@0.15.2/mock.ts";
 export { ensure, is } from "https://deno.land/x/unknownutil@v3.18.0/mod.ts";
diff --git a/doc/ddc.txt b/doc/ddc.txt
index 741fffa..c827961 100644
--- a/doc/ddc.txt
+++ b/doc/ddc.txt
@@ -53,7 +53,7 @@ INSTALL                                                          *ddc-install*
 NOTE: Ddc.vim requires Neovim (0.8.0+) or Vim 9.0.1276+ (latest is
 recommended).
 
-Please install both Deno and "denops.vim".
+Please install both Deno 1.42+ and "denops.vim".
 
 https://deno.land/
 https://github.com/vim-denops/denops.vim