diff --git a/src/clis/arxiv/utils.ts b/src/clis/arxiv/utils.ts
index b6265c0..b2a0eb1 100644
--- a/src/clis/arxiv/utils.ts
+++ b/src/clis/arxiv/utils.ts
@@ -54,7 +54,7 @@ export function parseEntries(xml: string): ArxivEntry[] {
       id: arxivId,
       title: extract(e, 'title').replace(/\s+/g, ' '),
       authors: extractAll(e, 'name').slice(0, 3).join(', '),
-      abstract: extract(e, 'summary').replace(/\s+/g, ' ').slice(0, 200) + '...',
+      abstract: (() => { const s = extract(e, 'summary').replace(/\s+/g, ' '); return s.length > 200 ? s.slice(0, 200) + '...' : s; })(),
       published: extract(e, 'published').slice(0, 10),
       url: `https://arxiv.org/abs/${arxivId}`,
     });
diff --git a/src/clis/wikipedia/search.ts b/src/clis/wikipedia/search.ts
index bc0b875..d2a78c3 100644
--- a/src/clis/wikipedia/search.ts
+++ b/src/clis/wikipedia/search.ts
@@ -2,6 +2,8 @@ import { cli, Strategy } from '../../registry.js';
 import { CliError } from '../../errors.js';
 import { wikiFetch } from './utils.js';
 
+interface WikiSearchResult { title: string; snippet: string; }
+
 cli({
   site: 'wikipedia',
   name: 'search',
@@ -18,10 +20,10 @@ cli({
     const limit = Math.max(1, Math.min(Number(args.limit), 50));
     const lang = args.lang || 'en';
     const q = encodeURIComponent(args.keyword);
-    const data = await wikiFetch(lang, `/w/api.php?action=query&list=search&srsearch=${q}&srlimit=${limit}&format=json&utf8=1`);
+    const data = await wikiFetch(lang, `/w/api.php?action=query&list=search&srsearch=${q}&srlimit=${limit}&format=json&utf8=1`) as { query?: { search?: WikiSearchResult[] } };
     const results = data?.query?.search;
     if (!results?.length) throw new CliError('NOT_FOUND', 'No articles found', 'Try a different keyword');
-    return results.map((r: any) => ({
+    return results.map((r) => ({
       title: r.title,
       snippet: r.snippet.replace(/<[^>]+>/g, '').slice(0, 120),
       url: `https://${lang}.wikipedia.org/wiki/${encodeURIComponent(r.title.replace(/ /g, '_'))}`,
diff --git a/src/clis/wikipedia/summary.ts b/src/clis/wikipedia/summary.ts
index a1119d2..f71fbf5 100644
--- a/src/clis/wikipedia/summary.ts
+++ b/src/clis/wikipedia/summary.ts
@@ -16,7 +16,7 @@ cli({
   func: async (_page, args) => {
     const lang = args.lang || 'en';
     const title = encodeURIComponent(args.title.replace(/ /g, '_'));
-    const data = await wikiFetch(lang, `/api/rest_v1/page/summary/${title}`);
+    const data = await wikiFetch(lang, `/api/rest_v1/page/summary/${title}`) as { title?: string; description?: string; extract?: string; content_urls?: { desktop?: { page?: string } } };
     if (!data?.title) throw new CliError('NOT_FOUND', `Article "${args.title}" not found`, 'Try searching first: opencli wikipedia search <keyword>');
     return [{
       title: data.title,
diff --git a/src/clis/wikipedia/utils.ts b/src/clis/wikipedia/utils.ts
index 04fa5a7..e37bb73 100644
--- a/src/clis/wikipedia/utils.ts
+++ b/src/clis/wikipedia/utils.ts
@@ -8,7 +8,7 @@
 
 import { CliError } from '../../errors.js';
 
-export async function wikiFetch(lang: string, path: string): Promise<any> {
+export async function wikiFetch(lang: string, path: string): Promise<unknown> {
   const url = `https://${lang}.wikipedia.org${path}`;
   const resp = await fetch(url, {
     headers: { 'User-Agent': 'opencli/1.0 (https://github.com/jackwener/opencli)' },