diff --git a/.env.example b/.env.example
index 35cc70f..d5909b8 100644
--- a/.env.example
+++ b/.env.example
@@ -1,4 +1,14 @@
 GITHUB_TOKEN=your_github_token_here
+# Public GitHub repository URL shown by the app.
+# If omitted, the app falls back to https://github.com/O2sa/DevImpact
+NEXT_PUBLIC_GITHUB_REPO_URL=your_github_repo_url_here
+
+
+# GitHub query limits
+GITHUB_REPO_COUNT=30
+GITHUB_PR_COUNT=80
+GITHUB_ISSUE_COUNT=20
+GITHUB_DISCUSSION_COUNT=10
 
 # Redis caching (optional)
 # Use either redis://localhost:6379 or include password if enabled: redis://:password@localhost:6379
diff --git a/README.md b/README.md
index cfba156..b306479 100644
--- a/README.md
+++ b/README.md
@@ -186,6 +186,12 @@ Create a `.env` file:
 
 ```
 GITHUB_TOKEN=your_github_token
+NEXT_PUBLIC_GITHUB_REPO_URL=your_github_repo_url
+GITHUB_REPO_COUNT=30
+GITHUB_PR_COUNT=80
+GITHUB_ISSUE_COUNT=20
+GITHUB_DISCUSSION_COUNT=10
+
 ```
 
 ---
diff --git a/components/github-link.tsx b/components/github-link.tsx
index 2c209c9..065282f 100644
--- a/components/github-link.tsx
+++ b/components/github-link.tsx
@@ -11,9 +11,10 @@ type GithubLinkProps = {
 export function GithubLink({ variant = "compact" }: GithubLinkProps) {
   const isProminent = variant === "prominent";
 
+  const githubRepoUrl= process.env.NEXT_PUBLIC_GITHUB_REPO_URL || "https://github.com/O2sa/DevImpact";
   return (
     <a
-      href="https://github.com/O2sa/DevImpact"
+      href={githubRepoUrl}
       target="_blank"
       rel="noopener noreferrer"
       aria-label="GitHub repository"
diff --git a/lib/github.test.ts b/lib/github.test.ts
new file mode 100644
index 0000000..0de8090
--- /dev/null
+++ b/lib/github.test.ts
@@ -0,0 +1,29 @@
+import {describe, expect, it} from "vitest";
+import {parseCountEnv} from "./github";
+
+
+describe("parseCountEnv", () => {
+  it("uses fallback for undefined", () => {
+    expect(parseCountEnv(undefined, 30, 100)).toBe(30);
+  });
+
+  it("parses a valid value", () => {
+    expect(parseCountEnv("50", 30, 100)).toBe(50);
+  });
+
+  it("uses fallback for non-numeric input", () => {
+    expect(parseCountEnv("abc", 30, 100)).toBe(30);
+  });
+
+  it("uses fallback for zero", () => {
+    expect(parseCountEnv("0", 30, 100)).toBe(30);
+  });
+
+  it("uses fallback for negative values", () => {
+    expect(parseCountEnv("-5", 30, 100)).toBe(30);
+  });
+
+  it("clamps values above the maximum", () => {
+    expect(parseCountEnv("500", 30, 100)).toBe(100);
+  });
+});
\ No newline at end of file
diff --git a/lib/github.ts b/lib/github.ts
index 4c2a369..78d1b02 100644
--- a/lib/github.ts
+++ b/lib/github.ts
@@ -16,7 +16,7 @@ import type {
 
 type Logger = Pick<Console, "info" | "warn">;
 
-type GitHubRawUser = {
+type GitHubRawUser = { 
   name: string | null;
   avatarUrl: string;
   repositories: { nodes: Array<RepoNode | null> };
@@ -71,6 +71,31 @@ export type GitHubFetcherDependencies = {
   logger?: Logger;
 };
 
+const DEFAULT_GITHUB_REPO_COUNT = 30;
+const DEFAULT_GITHUB_PR_COUNT = 80;
+const DEFAULT_GITHUB_ISSUE_COUNT = 20;
+const DEFAULT_GITHUB_DISCUSSION_COUNT = 10;
+
+
+const MAX_GITHUB_REPO_COUNT = 100;
+const MAX_GITHUB_PR_COUNT = 100;
+const MAX_GITHUB_ISSUE_COUNT = 100;
+const MAX_GITHUB_DISCUSSION_COUNT = 100;
+
+export function parseCountEnv(
+  value: string | undefined,
+  fallback: number,
+  maxValue: number,
+): number{
+
+  const parsed = Number.parseInt(value ?? "", 10);
+  if(!Number.isInteger(parsed)|| parsed<=0){
+    return fallback;
+  }
+  return Math.min(parsed, maxValue);
+
+}
+
 const USER_AND_PULL_REQUESTS_QUERY = /* GraphQL */ `
   query FetchUserAndPullRequests(
     $login: String!
@@ -275,6 +300,8 @@ export function buildGitHubUserCacheKey(
   return `${namespace}:github-user:${normalizeGitHubUsername(username)}`;
 }
 
+
+
 async function fetchUserDataFromGitHub(
   executor: GitHubQueryExecutor,
   username: string,
@@ -283,6 +310,31 @@ async function fetchUserDataFromGitHub(
   const externalIssueQuery = `type:issue author:${username} -user:${username}`;
   const externalDiscussionQuery = `author:${username} -user:${username}`;
 
+  
+const repoCount = parseCountEnv(
+  process.env.GITHUB_REPO_COUNT,
+  DEFAULT_GITHUB_REPO_COUNT,
+  MAX_GITHUB_REPO_COUNT,
+);
+
+const prCount = parseCountEnv(
+  process.env.GITHUB_PR_COUNT,
+  DEFAULT_GITHUB_PR_COUNT,
+  MAX_GITHUB_PR_COUNT,
+);
+
+const issueCount = parseCountEnv(
+  process.env.GITHUB_ISSUE_COUNT,
+  DEFAULT_GITHUB_ISSUE_COUNT,
+  MAX_GITHUB_ISSUE_COUNT,
+);
+
+const discussionCount = parseCountEnv(
+  process.env.GITHUB_DISCUSSION_COUNT,
+  DEFAULT_GITHUB_DISCUSSION_COUNT,
+  MAX_GITHUB_DISCUSSION_COUNT,
+);
+
   const userAndPrResponse =
     await executor.execute<
       FetchUserAndPullRequestsResponse,
@@ -297,8 +349,8 @@ async function fetchUserDataFromGitHub(
       query: USER_AND_PULL_REQUESTS_QUERY,
       variables: {
         login: username,
-        repoCount: 30,
-        prCount: 80,
+        repoCount,
+        prCount,
         externalPrQuery,
       },
     });
@@ -319,7 +371,7 @@ async function fetchUserDataFromGitHub(
       operationName: "FetchUserIssues",
       query: ISSUES_QUERY,
       variables: {
-        issueCount: 20,
+        issueCount,
         externalIssueQuery,
       },
     }),
@@ -333,7 +385,7 @@ async function fetchUserDataFromGitHub(
       operationName: "FetchUserDiscussions",
       query: DISCUSSIONS_QUERY,
       variables: {
-        discussionCount: 10,
+        discussionCount,
         externalDiscussionQuery,
       },
     }),