diff --git a/packages/backend/src/services/chart/core.ts b/packages/backend/src/services/chart/core.ts
index 625498c10a..89e1bbf706 100644
--- a/packages/backend/src/services/chart/core.ts
+++ b/packages/backend/src/services/chart/core.ts
@@ -306,7 +306,7 @@ export default abstract class Chart<T extends Schema> {
 			k.startsWith(columnPrefix),
 		) as (keyof Columns<T>)[]) {
 			kvs[
-				(k as string).substr(columnPrefix.length).split(columnDot).join(".")
+				(k as string).substring(columnPrefix.length).split(columnDot).join(".")
 			] = x[k];
 		}
 		return kvs as KVs<T>;
diff --git a/packages/client/src/components/MkDrive.file.vue b/packages/client/src/components/MkDrive.file.vue
index b8f02d1769..5e8a50eec2 100644
--- a/packages/client/src/components/MkDrive.file.vue
+++ b/packages/client/src/components/MkDrive.file.vue
@@ -27,11 +27,11 @@
 		<p class="name">
 			<span>{{
 				file.name.lastIndexOf(".") != -1
-					? file.name.substr(0, file.name.lastIndexOf("."))
+					? file.name.substring(0, file.name.lastIndexOf("."))
 					: file.name
 			}}</span>
 			<span v-if="file.name.lastIndexOf('.') != -1" class="ext">{{
-				file.name.substr(file.name.lastIndexOf("."))
+				file.name.substring(file.name.lastIndexOf("."))
 			}}</span>
 		</p>
 	</div>
diff --git a/packages/client/src/components/global/MkEmoji.vue b/packages/client/src/components/global/MkEmoji.vue
index 9ef6cec1f1..86e3d344b6 100644
--- a/packages/client/src/components/global/MkEmoji.vue
+++ b/packages/client/src/components/global/MkEmoji.vue
@@ -45,7 +45,7 @@ const ce = computed(() => props.customEmojis ?? instance.emojis ?? []);
 const customEmoji = computed(() =>
 	isCustom.value
 		? ce.value.find(
-				(x) => x.name === props.emoji.substr(1, props.emoji.length - 2),
+				(x) => x.name === props.emoji.substring(1, props.emoji.length - 1),
 			)
 		: null,
 );
diff --git a/packages/client/src/pages/admin/overview.queue.vue b/packages/client/src/pages/admin/overview.queue.vue
index bd5da06953..5fb11a2c7c 100644
--- a/packages/client/src/pages/admin/overview.queue.vue
+++ b/packages/client/src/pages/admin/overview.queue.vue
@@ -98,7 +98,7 @@ onMounted(() => {
 	connection.on("stats", onStats);
 	connection.on("statsLog", onStatsLog);
 	connection.send("requestLog", {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 		length: 100,
 	});
 });
diff --git a/packages/client/src/pages/admin/promotions.vue b/packages/client/src/pages/admin/promotions.vue
index 7f3da4d185..c2473b86b0 100644
--- a/packages/client/src/pages/admin/promotions.vue
+++ b/packages/client/src/pages/admin/promotions.vue
@@ -82,7 +82,7 @@ os.api("admin/ad/list").then((adsResponse) => {
 	ads.value = adsResponse;
 	// The date format should be changed to yyyy-MM-dd in order to be properly displayed
 	for (const i in ads.value) {
-		ads.value[i].expiresAt = ads.value[i].expiresAt.substr(0, 10);
+		ads.value[i].expiresAt = ads.value[i].expiresAt.substring(0, 10);
 	}
 });
 
diff --git a/packages/client/src/pages/admin/queue.chart.vue b/packages/client/src/pages/admin/queue.chart.vue
index 497010ec51..79da3531b2 100644
--- a/packages/client/src/pages/admin/queue.chart.vue
+++ b/packages/client/src/pages/admin/queue.chart.vue
@@ -128,7 +128,7 @@ onMounted(() => {
 	connection.on("stats", onStats);
 	connection.on("statsLog", onStatsLog);
 	connection.send("requestLog", {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 		length: 200,
 	});
 });
diff --git a/packages/client/src/widgets/job-queue.vue b/packages/client/src/widgets/job-queue.vue
index 8e5cb860fc..f72241ff87 100644
--- a/packages/client/src/widgets/job-queue.vue
+++ b/packages/client/src/widgets/job-queue.vue
@@ -212,7 +212,7 @@ connection.on("stats", onStats);
 connection.on("statsLog", onStatsLog);
 
 connection.send("requestLog", {
-	id: Math.random().toString().substr(2, 8),
+	id: Math.random().toString().substring(2, 10),
 	length: 1,
 });
 
diff --git a/packages/client/src/widgets/server-metric/cpu-mem.vue b/packages/client/src/widgets/server-metric/cpu-mem.vue
index 21997bf89e..d304dc1627 100644
--- a/packages/client/src/widgets/server-metric/cpu-mem.vue
+++ b/packages/client/src/widgets/server-metric/cpu-mem.vue
@@ -112,7 +112,7 @@ onMounted(() => {
 	props.connection.on("stats", onStats);
 	props.connection.on("statsLog", onStatsLog);
 	props.connection.send("requestLog", {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 	});
 });
 
diff --git a/packages/client/src/widgets/server-metric/net.vue b/packages/client/src/widgets/server-metric/net.vue
index 993c53c3c4..74571f2b10 100644
--- a/packages/client/src/widgets/server-metric/net.vue
+++ b/packages/client/src/widgets/server-metric/net.vue
@@ -66,7 +66,7 @@ onMounted(() => {
 	props.connection.on("stats", onStats);
 	props.connection.on("statsLog", onStatsLog);
 	props.connection.send("requestLog", {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 	});
 });
 
diff --git a/packages/megalodon/src/parser.ts b/packages/megalodon/src/parser.ts
index 31365e537a..7946f5545d 100644
--- a/packages/megalodon/src/parser.ts
+++ b/packages/megalodon/src/parser.ts
@@ -47,8 +47,8 @@ export class Parser extends EventEmitter {
 				if (root.length !== 2) continue;
 
 				// remove event and data markers
-				const event: string = root[0].substr(7);
-				const data: string = root[1].substr(6);
+				const event: string = root[0].substring(7);
+				const data: string = root[1].substring(6);
 
 				let jsonObj = {};
 				try {