diff --git a/deno.jsonc b/deno.jsonc
index a3cbd80..ae689a1 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -37,7 +37,6 @@
     "@std/assert": "jsr:@std/assert@^1",
     "@std/cli": "jsr:@std/cli@^1",
     "@std/fs": "jsr:@std/fs@^1",
-    "@std/http": "jsr:@std/http@^0.206.0",
     "@std/path": "jsr:@std/path@^1.0.9",
     "@std/testing": "jsr:@std/testing@^1",
     "@std/text": "jsr:@std/text@^1"
diff --git a/scripts/src/imports/update.ts b/scripts/src/imports/update.ts
index e49ab4f..6058f43 100644
--- a/scripts/src/imports/update.ts
+++ b/scripts/src/imports/update.ts
@@ -1,5 +1,5 @@
 import { parseArgs } from "@std/cli/parse-args";
-import { createHttpError } from "@std/http/http-errors";
+import { createHttpError } from "jsr:@std/http@^0.206.0/http-errors";
 import { dirname, join, relative } from "@std/path";
 
 // Regex for https://deno.land/x/deno_slack_api@x.x.x/
@@ -27,10 +27,11 @@ async function main() {
 
   const apiDepsInSdk = await apiDepsIn(denoSlackSdkValue);
 
+  // Use "src" not "/src/" - leading slash makes join() treat it as absolute, dropping the relative path
   const apiPackageSpecifier = join(
     relative(importFileDir, apiDir),
-    "/src/",
-  );
+    "src",
+  ) + "/";
 
   importFile["imports"]["deno-slack-api/"] = apiPackageSpecifier;
   importFile["scopes"] = {
diff --git a/scripts/src/imports/update_test.ts b/scripts/src/imports/update_test.ts
index 9849a68..9c3260c 100644
--- a/scripts/src/imports/update_test.ts
+++ b/scripts/src/imports/update_test.ts
@@ -1,4 +1,4 @@
-import { isHttpError } from "@std/http/http-errors";
+import { isHttpError } from "jsr:@std/http@^0.206.0/http-errors";
 import { assertEquals, assertRejects } from "@std/assert";
 import { apiDepsIn } from "./update.ts";
 import { stubFetch } from "../../../testing/http.ts";
diff --git a/src/api_test.ts b/src/api_test.ts
index 2f61e0b..642b0dd 100644
--- a/src/api_test.ts
+++ b/src/api_test.ts
@@ -5,7 +5,7 @@ import {
   assertRejects,
 } from "@std/assert";
 import { SlackAPI } from "./mod.ts";
-import { HttpError } from "@std/http/http-errors";
+import { HttpError } from "jsr:@std/http@^0.206.0/http-errors";
 import { stubFetch } from "../testing/http.ts";
 
 Deno.test("SlackAPI class", async (t) => {
diff --git a/src/base-client.ts b/src/base-client.ts
index 7f9134d..256e5a6 100644
--- a/src/base-client.ts
+++ b/src/base-client.ts
@@ -4,7 +4,7 @@ import type {
   SlackAPIMethodArgs,
   SlackAPIOptions,
 } from "./types.ts";
-import { createHttpError, type HttpError } from "@std/http/http-errors";
+import { createHttpError, type HttpError } from "jsr:@std/http@^0.206.0/http-errors";
 import { getUserAgent, serializeData } from "./base-client-helpers.ts";
 
 export class BaseSlackAPIClient implements BaseSlackClient {