diff --git a/cli.ts b/cli.ts
index 2b03f19..70cd9c4 100644
--- a/cli.ts
+++ b/cli.ts
@@ -1,4 +1,5 @@
 import { dpx } from "./mod.ts";
+import { parse } from "https://deno.land/std/flags/mod.ts";
 
 const DENO_FLAGS = [
   "-A",
@@ -11,7 +12,7 @@ const DENO_FLAGS = [
   "--allow-run",
   "--allow-write=",
   "--reload",
-  "-R",
+  "-r",
   "--lock=",
   "--importmap=",
   "--unstable",
@@ -25,6 +26,11 @@ if (import.meta.main) {
   const flags: string[] = [];
   const args: string[] = [];
   let packageName = "";
+  let registry: string | undefined = undefined;
+
+  let argsv = parse(Deno.args);
+  registry = argsv.registry
+
   Deno.args.forEach((arg, index) => {
     if (index === 0) packageName = arg;
     let isDenoFlag = false;
@@ -38,5 +44,5 @@ if (import.meta.main) {
     if (isDenoFlag) flags.push(arg);
     else args.push(arg);
   });
-  dpx(packageName, flags, args);
+  dpx(packageName, flags, args, registry);
 }
diff --git a/mod.ts b/mod.ts
index 5494b97..c143ed8 100644
--- a/mod.ts
+++ b/mod.ts
@@ -1,10 +1,12 @@
+import { getRegistryUrl } from "./src/utils.ts"
+
 /** Get the file URL to run */
-export async function getEntryFile(packageName: string) {
-  const REPO_URL = `https://deno.land/x/${packageName}`;
+export async function getEntryFile(packageName: string, registry?: string) {
+  let repo_url = getRegistryUrl(packageName, registry)
   const potentialFiles = ["cli.ts", "mod.ts"];
   let fileUrl = "";
   for await (const file of potentialFiles) {
-    fileUrl = `${REPO_URL}/${file}`;
+    fileUrl = `${repo_url}/${file}`;
     const fetchResult = await fetch(fileUrl);
     if (fetchResult.ok) {
       const text = await fetchResult.text();
@@ -28,9 +30,10 @@ export async function getEntryFile(packageName: string) {
 export async function dpx(
   packageName: string,
   flags: string[],
-  args: string[]
+  args: string[],
+  registry?: string
 ) {
-  const filePath = await getEntryFile(packageName);
+  const filePath = await getEntryFile(packageName, registry);
   return Deno.run({
     cmd: ["deno", "run", ...flags, filePath, ...args],
     stdout: "inherit",
diff --git a/src/Repository.ts b/src/Repository.ts
new file mode 100644
index 0000000..4d3e511
--- /dev/null
+++ b/src/Repository.ts
@@ -0,0 +1,4 @@
+export type Repository = {
+    name: string,
+    url: string
+}
\ No newline at end of file
diff --git a/src/utils.ts b/src/utils.ts
new file mode 100644
index 0000000..9e2c257
--- /dev/null
+++ b/src/utils.ts
@@ -0,0 +1,57 @@
+import { Repository } from "./Repository.ts"
+
+const Repositories: Array<Repository> = [
+    {
+        name: 'deno',
+        url: 'https://deno.land/x'
+    },
+    {
+        name: 'nest',
+        url: 'https://x.nest.land'
+    }
+];
+
+/**
+ * Calculate the registry url for a package.
+ * @param packageName deno package.
+ * @param registry custom registry.
+ */
+export function getRegistryUrl(packageName: string, registry?: string): string {
+    // Custom Registry by url
+    if (registry !== undefined) {
+        let reg = trimChar(registry as string, "/");
+        return `${reg}/${packageName}`
+    }
+
+    //Custom Registry provided with package: repo/pack
+    if (packageName.indexOf('/') > 0) {
+        let sp = packageName.split('/')
+        let reg  = sp[0]
+        packageName = sp[1]
+        reg = getRepositoryUrl(reg)
+        return `${reg}/${packageName}`
+    }
+
+    // Default deno.land registry
+    return `https://deno.land/x/${packageName}`;
+}
+
+/**
+ * Trim the input string with specified char.
+ * @param input input string.
+ * @param char char to trim.
+ */
+export function trimChar(input: string, char: string): string {
+    char = escapeRegExp(char);
+    var regEx = new RegExp("^[" + char + "]+|[" + char + "]+$", "g");
+    return input.replace(regEx, "");
+}
+
+function getRepositoryUrl(name: string): string {
+    let result = Repositories.find(r => r.name === name);
+    return result === undefined ? Repositories[0].url : result.url;
+}
+
+function escapeRegExp(input: string): string {
+    return input.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+}
\ No newline at end of file
diff --git a/src/utils_test.ts b/src/utils_test.ts
new file mode 100644
index 0000000..5e32a83
--- /dev/null
+++ b/src/utils_test.ts
@@ -0,0 +1,52 @@
+import * as utils from './utils.ts'
+import { assertEquals } from "https://deno.land/std/testing/asserts.ts"
+
+Deno.test(
+    "Utils - trimChar-1",
+    (): void => {
+      assertEquals(
+       utils.trimChar("https://www.google.com/", "/"), 
+       "https://www.google.com"
+      );
+    }
+  );
+
+  Deno.test(
+    "Utils - trimChar-2",
+    (): void => {
+      assertEquals(
+       utils.trimChar("https://www.google.com//", "/"), 
+       "https://www.google.com"
+      );
+    }
+  );
+
+  Deno.test(
+    "Utils - getRegistryUrl - Only Package Name",
+    (): void => {
+      assertEquals(
+       utils.getRegistryUrl("online"),
+       "https://deno.land/x/online"
+      );
+    }
+  );
+
+  Deno.test(
+    "Utils - getRegistryUrl - Registry URL",
+    (): void => {
+      assertEquals(
+       utils.getRegistryUrl("online", "https://www.myrepo.com/abc/"),
+       "https://www.myrepo.com/abc/online"
+      );
+    }
+  );
+
+  Deno.test(
+    "Utils - getRegistryUrl - Registry/Package",
+    (): void => {
+      assertEquals(
+       utils.getRegistryUrl("nest/deno_gui@2.0.5"),
+       "https://x.nest.land/deno_gui@2.0.5"
+      );
+    }
+  );
\ No newline at end of file