diff --git a/lib/alg/components.js b/lib/alg/components.js
index deeb85ed..df4f9e87 100644
--- a/lib/alg/components.js
+++ b/lib/alg/components.js
@@ -6,7 +6,7 @@ function components(g) {
   var cmpt;
 
   function dfs(v) {
-    if (visited.hasOwnProperty(v)) return;
+    if (Object.hasOwn(visited, v)) return;
     visited[v] = true;
     cmpt.push(v);
     g.successors(v).forEach(dfs);
diff --git a/lib/alg/dfs.js b/lib/alg/dfs.js
index 34a323cb..447f6a74 100644
--- a/lib/alg/dfs.js
+++ b/lib/alg/dfs.js
@@ -36,7 +36,7 @@ function postOrderDfs(v, navigation, visited, acc) {
     if (curr[1]) {
       acc.push(curr[0]);
     } else {
-      if (!visited.hasOwnProperty(curr[0])) {
+      if (!Object.hasOwn(visited, curr[0])) {
         visited[curr[0]] = true;
         stack.push([curr[0], true]);
         forEachRight(navigation(curr[0]), w => stack.push([w, false]));
@@ -49,7 +49,7 @@ function preOrderDfs(v, navigation, visited, acc) {
   var stack = [v];
   while (stack.length > 0) {
     var curr = stack.pop();
-    if (!visited.hasOwnProperty(curr)) {
+    if (!Object.hasOwn(visited, curr)) {
       visited[curr] = true;
       acc.push(curr);
       forEachRight(navigation(curr), w => stack.push(w));
diff --git a/lib/alg/prim.js b/lib/alg/prim.js
index 72fcd841..e9ec3e4d 100644
--- a/lib/alg/prim.js
+++ b/lib/alg/prim.js
@@ -36,7 +36,7 @@ function prim(g, weightFunc) {
   var init = false;
   while (pq.size() > 0) {
     v = pq.removeMin();
-    if (parents.hasOwnProperty(v)) {
+    if (Object.hasOwn(parents, v)) {
       result.setEdge(v, parents[v]);
     } else if (init) {
       throw new Error("Input graph is not connected: " + g);
diff --git a/lib/alg/tarjan.js b/lib/alg/tarjan.js
index c00eeba7..a6146df0 100644
--- a/lib/alg/tarjan.js
+++ b/lib/alg/tarjan.js
@@ -15,7 +15,7 @@ function tarjan(g) {
     stack.push(v);
 
     g.successors(v).forEach(function(w) {
-      if (!visited.hasOwnProperty(w)) {
+      if (!Object.hasOwn(visited, w)) {
         dfs(w);
         entry.lowlink = Math.min(entry.lowlink, visited[w].lowlink);
       } else if (visited[w].onStack) {
@@ -36,7 +36,7 @@ function tarjan(g) {
   }
 
   g.nodes().forEach(function(v) {
-    if (!visited.hasOwnProperty(v)) {
+    if (!Object.hasOwn(visited, v)) {
       dfs(v);
     }
   });
diff --git a/lib/alg/topsort.js b/lib/alg/topsort.js
index 5986ce02..082044fe 100644
--- a/lib/alg/topsort.js
+++ b/lib/alg/topsort.js
@@ -4,11 +4,11 @@ function topsort(g) {
   var results = [];
 
   function visit(node) {
-    if (stack.hasOwnProperty(node)) {
+    if (Object.hasOwn(stack, node)) {
       throw new CycleException();
     }
 
-    if (!visited.hasOwnProperty(node)) {
+    if (!Object.hasOwn(visited, node)) {
       stack[node] = true;
       visited[node] = true;
       g.predecessors(node).forEach(visit);
diff --git a/lib/data/priority-queue.js b/lib/data/priority-queue.js
index 6ce46fe8..d0836561 100644
--- a/lib/data/priority-queue.js
+++ b/lib/data/priority-queue.js
@@ -27,7 +27,7 @@ class PriorityQueue {
    * Returns `true` if **key** is in the queue and `false` if not.
    */
   has(key) {
-    return this._keyIndices.hasOwnProperty(key);
+    return Object.hasOwn(this._keyIndices, key);
   }
 
   /**
@@ -65,7 +65,7 @@ class PriorityQueue {
   add(key, priority) {
     var keyIndices = this._keyIndices;
     key = String(key);
-    if (!keyIndices.hasOwnProperty(key)) {
+    if (!Object.hasOwn(keyIndices, key)) {
       var arr = this._arr;
       var index = arr.length;
       keyIndices[key] = index;
diff --git a/lib/graph.js b/lib/graph.js
index da9fa731..c593dc71 100644
--- a/lib/graph.js
+++ b/lib/graph.js
@@ -61,9 +61,9 @@ class Graph {
 
   constructor(opts) {
     if (opts) {
-      this._isDirected = opts.hasOwnProperty("directed") ? opts.directed : true;
-      this._isMultigraph = opts.hasOwnProperty("multigraph") ? opts.multigraph : false;
-      this._isCompound = opts.hasOwnProperty("compound") ? opts.compound : false;
+      this._isDirected = Object.hasOwn(opts, "directed") ? opts.directed : true;
+      this._isMultigraph = Object.hasOwn(opts, "multigraph") ? opts.multigraph : false;
+      this._isCompound = Object.hasOwn(opts, "compound") ? opts.compound : false;
     }
 
     if (this._isCompound) {
@@ -192,7 +192,7 @@ class Graph {
    * Complexity: O(1).
    */
   setNode(v, value) {
-    if (this._nodes.hasOwnProperty(v)) {
+    if (Object.hasOwn(this._nodes, v)) {
       if (arguments.length > 1) {
         this._nodes[v] = value;
       }
@@ -225,7 +225,7 @@ class Graph {
    * Detects whether graph has a node with specified name or not.
    */
   hasNode(v) {
-    return this._nodes.hasOwnProperty(v);
+    return Object.hasOwn(this._nodes, v);
   }
 
   /**
@@ -236,7 +236,7 @@ class Graph {
    */
   removeNode(v) {
     var self = this;
-    if (this._nodes.hasOwnProperty(v)) {
+    if (Object.hasOwn(this._nodes, v)) {
       var removeEdge = e => self.removeEdge(self._edgeObjs[e]);
       delete this._nodes[v];
       if (this._isCompound) {
@@ -514,7 +514,7 @@ class Graph {
     }
 
     var e = edgeArgsToId(this._isDirected, v, w, name);
-    if (this._edgeLabels.hasOwnProperty(e)) {
+    if (Object.hasOwn(this._edgeLabels, e)) {
       if (valueSpecified) {
         this._edgeLabels[e] = value;
       }
@@ -579,7 +579,7 @@ class Graph {
     var e = (arguments.length === 1
       ? edgeObjToId(this._isDirected, arguments[0])
       : edgeArgsToId(this._isDirected, v, w, name));
-    return this._edgeLabels.hasOwnProperty(e);
+    return Object.hasOwn(this._edgeLabels, e);
   }
 
   /**