diff --git a/eslint-configs/eslint-config-seekingalpha-base/CHANGELOG.md b/eslint-configs/eslint-config-seekingalpha-base/CHANGELOG.md
index b4650d3f..433e75f2 100644
--- a/eslint-configs/eslint-config-seekingalpha-base/CHANGELOG.md
+++ b/eslint-configs/eslint-config-seekingalpha-base/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Change Log
 
+## 11.8.0 - 2025-04-28
+
+- [deps] update `eslint-plugin-unicorn` to version `59.0.0`
+- [breaking] enable `unicorn/no-unnecessary-array-flat-depth` rule
+- [breaking] enable `unicorn/no-unnecessary-array-splice-count` rule
+- [breaking] enable `unicorn/prefer-import-meta-properties` rule
+
 ## 11.7.0 - 2025-04-22
 
 - [deps] update `eslint` to version `9.25.1`
diff --git a/eslint-configs/eslint-config-seekingalpha-base/README.md b/eslint-configs/eslint-config-seekingalpha-base/README.md
index 85957a46..381e6125 100644
--- a/eslint-configs/eslint-config-seekingalpha-base/README.md
+++ b/eslint-configs/eslint-config-seekingalpha-base/README.md
@@ -6,7 +6,7 @@ This package includes the shareable ESLint config used by [SeekingAlpha](https:/
 
 Install ESLint and all [Peer Dependencies](https://nodejs.org/en/blog/npm/peer-dependencies/):
 
-    npm install eslint@9.25.1 eslint-plugin-array-func@5.0.2 eslint-plugin-import@2.31.0 eslint-plugin-promise@7.2.1 eslint-plugin-unicorn@58.0.0 --save-dev
+    npm install eslint@9.25.1 eslint-plugin-array-func@5.0.2 eslint-plugin-import@2.31.0 eslint-plugin-promise@7.2.1 eslint-plugin-unicorn@59.0.0 --save-dev
 
 Install SeekingAlpha shareable ESLint:
 
diff --git a/eslint-configs/eslint-config-seekingalpha-base/package.json b/eslint-configs/eslint-config-seekingalpha-base/package.json
index a3b717fa..28814b35 100644
--- a/eslint-configs/eslint-config-seekingalpha-base/package.json
+++ b/eslint-configs/eslint-config-seekingalpha-base/package.json
@@ -1,6 +1,6 @@
 {
   "name": "eslint-config-seekingalpha-base",
-  "version": "11.7.0",
+  "version": "11.8.0",
   "description": "SeekingAlpha's sharable base ESLint config",
   "main": "index.js",
   "type": "module",
@@ -52,7 +52,7 @@
     "eslint-plugin-array-func": "5.0.2",
     "eslint-plugin-import": "2.31.0",
     "eslint-plugin-promise": "7.2.1",
-    "eslint-plugin-unicorn": "58.0.0"
+    "eslint-plugin-unicorn": "59.0.0"
   },
   "devDependencies": {
     "eslint": "9.25.1",
@@ -60,6 +60,6 @@
     "eslint-plugin-array-func": "5.0.2",
     "eslint-plugin-import": "2.31.0",
     "eslint-plugin-promise": "7.2.1",
-    "eslint-plugin-unicorn": "58.0.0"
+    "eslint-plugin-unicorn": "59.0.0"
   }
 }
diff --git a/eslint-configs/eslint-config-seekingalpha-base/rules/eslint-plugin-unicorn/index.js b/eslint-configs/eslint-config-seekingalpha-base/rules/eslint-plugin-unicorn/index.js
index 748272db..37edd534 100644
--- a/eslint-configs/eslint-config-seekingalpha-base/rules/eslint-plugin-unicorn/index.js
+++ b/eslint-configs/eslint-config-seekingalpha-base/rules/eslint-plugin-unicorn/index.js
@@ -88,8 +88,8 @@ export default {
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-array-method-this-argument.md
     'unicorn/no-array-method-this-argument': 'error',
 
-    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-array-push-push.md
-    'unicorn/no-array-push-push': 'error',
+    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-single-call.md
+    'unicorn/prefer-single-call': 'error',
 
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/master/docs/rules/no-array-reduce.md
     'unicorn/no-array-reduce': 'off',
@@ -182,8 +182,8 @@ export default {
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-single-promise-in-promise-methods.md
     'unicorn/no-single-promise-in-promise-methods': 'error',
 
-    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-length-as-slice-end.md
-    'unicorn/no-length-as-slice-end': 'error',
+    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-unnecessary-slice-end.md
+    'unicorn/no-unnecessary-slice-end': 'error',
 
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-static-only-class.md
     'unicorn/no-static-only-class': 'error',
@@ -200,6 +200,12 @@ export default {
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-unnecessary-await.md
     'unicorn/no-unnecessary-await': 'error',
 
+    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-unnecessary-array-flat-depth.md
+    'unicorn/no-unnecessary-array-flat-depth': 'error',
+
+    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-unnecessary-array-splice-count.md
+    'unicorn/no-unnecessary-array-splice-count': 'error',
+
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/no-unnecessary-polyfills.md
     'unicorn/no-unnecessary-polyfills': 'error',
 
@@ -301,6 +307,9 @@ export default {
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-global-this.md
     'unicorn/prefer-global-this': 'off',
 
+    // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-import-meta-properties.md
+    'unicorn/prefer-import-meta-properties': 'error',
+
     // https://github.com/sindresorhus/eslint-plugin-unicorn/blob/master/docs/rules/prefer-includes.md
     'unicorn/prefer-includes': 'error',
 
diff --git a/package.json b/package.json
index 5656312f..8a76053c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "seekingalpha-javascript-style",
-  "version": "9.14.0",
+  "version": "9.15.0",
   "description": "Set of linting rules, guides and best practices for best Javascript code",
   "main": "index.js",
   "type": "module",