diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index f7597af6..c835ecac 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x]
+        node-version: [18.x]
         os: [ubuntu-latest]
 
     steps:
diff --git a/.github/workflows/npm-test.yml b/.github/workflows/npm-test.yml
index 4d3582e5..554ab727 100644
--- a/.github/workflows/npm-test.yml
+++ b/.github/workflows/npm-test.yml
@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [18.x, 20.x]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
diff --git a/lib/server.ts b/lib/server.ts
index cdb1d1d0..632c2756 100644
--- a/lib/server.ts
+++ b/lib/server.ts
@@ -12,7 +12,7 @@ import { CoapServerOptions, requestListener, CoapPacket, Block, MiddlewareParame
 import BlockCache from './cache'
 import OutgoingMessage from './outgoing_message'
 import { Socket, createSocket, SocketOptions } from 'dgram'
-import LRUCache from 'lru-cache'
+import { LRUCache } from 'lru-cache'
 import os from 'os'
 import IncomingMessage from './incoming_message'
 import ObserveStream from './observe_write_stream'
@@ -77,8 +77,8 @@ function allAddresses (type): string[] {
     return addresses
 }
 
-class CoapLRUCache<K, V> extends LRUCache<K, V> {
-    pruneTimer: NodeJS.Timer
+class CoapLRUCache<K extends {}, V extends {}> extends LRUCache<K, V> {
+    pruneTimer: NodeJS.Timeout
 }
 
 class CoAPServer extends EventEmitter {
@@ -148,19 +148,19 @@ class CoAPServer extends EventEmitter {
         // 32 MB / 1280 = 26214
         // The max lifetime is roughly 200s per packet.
         // Which gave us 131 packets/second guarantee
-        let max = 32768 * 1024
+        let maxSize = 32768 * 1024
 
         if (typeof this._options.cacheSize === 'number' && this._options.cacheSize >= 0) {
-            max = this._options.cacheSize
+            maxSize = this._options.cacheSize
         }
 
         this._lru = new CoapLRUCache({
-            max,
-            length: (n, key) => {
+            maxSize,
+            sizeCalculation: (n, key) => {
                 return n.buffer.byteLength
             },
-            maxAge: parameters.exchangeLifetime * 1000,
-            dispose: (key, value) => {
+            ttl: parameters.exchangeLifetime * 1000,
+            dispose: (value, key) => {
                 if (value.sender != null) {
                     value.sender.reset()
                 }
@@ -345,7 +345,7 @@ class CoAPServer extends EventEmitter {
         if (parameters.pruneTimerPeriod != null) {
             // Start LRU pruning timer
             this._lru.pruneTimer = setInterval(() => {
-                this._lru.prune()
+                this._lru.purgeStale()
             }, parameters.pruneTimerPeriod * 1000)
             if (this._lru.pruneTimer.unref != null) {
                 this._lru.pruneTimer.unref()
@@ -368,11 +368,11 @@ class CoAPServer extends EventEmitter {
             if (this._internal_socket && this._sock instanceof Socket) {
                 this._sock.close()
             }
-            this._lru.reset()
+            this._lru.clear()
             this._sock = null
             this.emit('close')
         } else {
-            this._lru.reset()
+            this._lru.clear()
         }
 
         this._block2Cache.reset()
@@ -409,7 +409,8 @@ class CoAPServer extends EventEmitter {
             if (cached.response != null && (packet.reset ?? false)) {
                 cached.response.end()
             }
-            return lru.del(this._toKey(request, packet, false))
+            lru.delete(this._toKey(request, packet, false))
+            return
         } else if (packet.ack ?? packet.reset ?? false) {
             return // nothing to do, ignoring silently
         }
diff --git a/package.json b/package.json
index 3d87df14..ddfb3610 100644
--- a/package.json
+++ b/package.json
@@ -54,18 +54,18 @@
     "typescript": "^4.9.3"
   },
   "dependencies": {
-    "@types/lru-cache": "^5.1.1",
+    "@types/lru-cache": "^7.10.10",
     "bl": "^6.0.0",
     "@types/readable-stream": "^2.3.15",
     "capitalize": "^2.0.4",
     "coap-packet": "^1.1.1",
     "debug": "^4.3.4",
     "fastseries": "^2.0.0",
-    "lru-cache": "^6.0.0",
+    "lru-cache": "^10.0.3",
     "readable-stream": "^4.2.0"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=18"
   },
   "files": [
     "dist/index.d.ts",
diff --git a/test/server.ts b/test/server.ts
index cae442c4..e5f269a3 100644
--- a/test/server.ts
+++ b/test/server.ts
@@ -1222,14 +1222,14 @@ describe('server LRU', function () {
         server.on('request', (req, res) => {
             res.end()
 
-            expect(server._lru.itemCount).to.be.equal(1)
+            expect(server._lru.size).to.be.equal(1)
 
             clock.tick(parameters.exchangeLifetime * 500)
 
-            expect(server._lru.itemCount).to.be.equal(1)
+            expect(server._lru.size).to.be.equal(1)
 
             clock.tick(parameters.exchangeLifetime * 1000)
-            expect(server._lru.itemCount).to.be.equal(0)
+            expect(server._lru.size).to.be.equal(0)
             done()
         })
     })