diff --git a/import_map.json b/import_map.json
index d440e22..4501036 100644
--- a/import_map.json
+++ b/import_map.json
@@ -3,7 +3,7 @@
     "deno-slack-sdk/": "https://deno.land/x/deno_slack_sdk@2.5.0/",
     "deno-slack-api/": "https://deno.land/x/deno_slack_api@2.1.2/",
     "ptera/": "https://deno.land/x/ptera@v1.0.2/",
-    "std/": "https://deno.land/std@0.209.0/",
+    "std/": "https://deno.land/std@0.210.0/",
     "mock_fetch/": "https://deno.land/x/mock_fetch@0.3.0/"
   }
 }