diff --git a/CHANGELOG.md b/CHANGELOG.md
index 504fa57..0c0ae1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -90,6 +90,7 @@ For major (breaking) changes - **version 4, 3 and 2** - see end of page.
 
 | Version | Date       | Comment                                                                                             |
 | ------- | ---------- | --------------------------------------------------------------------------------------------------- |
+| 5.30.5  | 2026-01-16 | `networkInterfaces()` fix uppercase iface names (linux)                                             |
 | 5.30.4  | 2026-01-15 | `powerShell()` fix UTF8 output (windows)                                                            |
 | 5.30.3  | 2026-01-11 | Updated docs, code cleanup                                                                          |
 | 5.30.2  | 2026-01-08 | `processes()` revert added user (windows)                                                           |
diff --git a/docs/history.html b/docs/history.html
index ecce61b..3d23459 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -57,6 +57,12 @@
                     </tr>
                   </thead>
                   <tbody>
+                    <tr>
+                      <th scope="row">5.30.5
+                      </th>
+                      <td>2026-01-16</td>
+                      <td><span class="code">networkInterfaces()</span> fix uppercase support (linux)</td>
+                    </tr>
                     <tr>
                       <th scope="row">5.30.4
                       </th>
diff --git a/docs/index.html b/docs/index.html
index ba7d175..5df56eb 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -170,7 +170,7 @@
       <img class="logo" src="assets/logo.png" alt="logo">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span>&nbsp;</div>
-      <div class="version">New Version: <span id="version">5.30.4</span></div>
+      <div class="version">New Version: <span id="version">5.30.5</span></div>
       <button class="btn btn-light" onclick="location.href='https://github.com/sebhildebrandt/systeminformation'">View on Github <i class=" fab fa-github"></i></button>
     </div>
     <div class="down">
@@ -212,7 +212,7 @@
           <div class="title">Downloads last month</div>
         </div>
         <div class="col-xl-4 col-lg-4 col-md-4 col-12">
-          <div class="numbers">940</div>
+          <div class="numbers">941</div>
           <div class="title">Dependents</div>
         </div>
       </div>
diff --git a/lib/network.js b/lib/network.js
index 254e6f0..2442f00 100644
--- a/lib/network.js
+++ b/lib/network.js
@@ -281,7 +281,7 @@ function getWindowsNics() {
 function getWindowsDNSsuffixes() {
   let iface = {};
 
-  let dnsSuffixes = {
+  const dnsSuffixes = {
     primaryDNS: '',
     exitCode: 0,
     ifaces: []
@@ -374,7 +374,7 @@ function getWindowsWirelessIfaceSSID(interfaceName) {
   }
 }
 function getWindowsIEEE8021x(connectionType, iface, ifaces) {
-  let i8021x = {
+  const i8021x = {
     state: 'Unknown',
     protocol: 'Unknown'
   };
@@ -947,7 +947,7 @@ function networkInterfaces(callback, rescan, defaultString) {
                 ip6 = ip6link;
                 ip6subnet = ip6linksubnet;
               }
-              const iface = dev.split(':')[0].trim().toLowerCase();
+              const iface = dev.split(':')[0].trim();
               let ifaceSanitized = '';
               const s = util.isPrototypePolluted() ? '---' : util.sanitizeShellString(iface);
               const l = util.mathMin(s.length, 2000);
@@ -1290,7 +1290,7 @@ function networkStats(ifaces, callback) {
           Object.setPrototypeOf(ifaces, util.stringObj);
         }
 
-        ifaces = ifaces.trim().toLowerCase().replace(/,+/g, '|');
+        ifaces = ifaces.trim().replace(/,+/g, '|');
         ifacesArray = ifaces.split('|');
       }
 
@@ -1334,11 +1334,11 @@ function networkStats(ifaces, callback) {
 
 function networkStatsSingle(iface) {
   function parseLinesWindowsPerfData(sections) {
-    let perfData = [];
+    const perfData = [];
     for (let i in sections) {
       if ({}.hasOwnProperty.call(sections, i)) {
         if (sections[i].trim() !== '') {
-          let lines = sections[i].trim().split('\r\n');
+          const lines = sections[i].trim().split('\r\n');
           perfData.push({
             name: util
               .getValue(lines, 'Name', ':')
@@ -1595,7 +1595,7 @@ function getProcessName(processes, pid) {
 function networkConnections(callback) {
   return new Promise((resolve) => {
     process.nextTick(() => {
-      let result = [];
+      const result = [];
       if (_linux || _freebsd || _openbsd || _netbsd) {
         let cmd =
           'export LC_ALL=C; netstat -tunap | grep "ESTABLISHED\\|SYN_SENT\\|SYN_RECV\\|FIN_WAIT1\\|FIN_WAIT2\\|TIME_WAIT\\|CLOSE\\|CLOSE_WAIT\\|LAST_ACK\\|LISTEN\\|CLOSING\\|UNKNOWN"; unset LC_ALL';
@@ -1689,13 +1689,6 @@ function networkConnections(callback) {
                         }
                       }
                     }
-                    // if (line.length >= 7 && line[6].indexOf('users:') > -1) {
-                    //   const proc = line[6].replace('users:(("', '').replace(/"/g, '').split(',');
-                    //   if (proc.length > 2) {
-                    //     process = proc[0].split(' ')[0].split(':')[0];
-                    //     pid = parseInt(proc[1], 10);
-                    //   }
-                    // }
                     if (connstate) {
                       result.push({
                         protocol: line[0],
@@ -1806,7 +1799,7 @@ function networkConnections(callback) {
                 if (line.length >= 4) {
                   let localip = line[1];
                   let localport = '';
-                  let localaddress = line[1].split(':');
+                  const localaddress = line[1].split(':');
                   if (localaddress.length > 1) {
                     localport = localaddress[localaddress.length - 1];
                     localaddress.pop();
@@ -1815,14 +1808,14 @@ function networkConnections(callback) {
                   localip = localip.replace(/\[/g, '').replace(/\]/g, '');
                   let peerip = line[2];
                   let peerport = '';
-                  let peeraddress = line[2].split(':');
+                  const peeraddress = line[2].split(':');
                   if (peeraddress.length > 1) {
                     peerport = peeraddress[peeraddress.length - 1];
                     peeraddress.pop();
                     peerip = peeraddress.join(':');
                   }
                   peerip = peerip.replace(/\[/g, '').replace(/\]/g, '');
-                  let pid = util.toInt(line[4]);
+                  const pid = util.toInt(line[4]);
                   let connstate = line[3];
                   if (connstate === 'HERGESTELLT') {
                     connstate = 'ESTABLISHED';
@@ -1901,7 +1894,7 @@ function networkGatewayDefault(callback) {
     process.nextTick(() => {
       let result = '';
       if (_linux || _freebsd || _openbsd || _netbsd) {
-        let cmd = 'ip route get 1';
+        const cmd = 'ip route get 1';
         try {
           exec(cmd, { maxBuffer: 1024 * 102400 }, (error, stdout) => {
             if (!error) {