diff --git a/src/AdapterTestUtilities/composer.json b/src/AdapterTestUtilities/composer.json
index fba98d69d..cd8c00f13 100644
--- a/src/AdapterTestUtilities/composer.json
+++ b/src/AdapterTestUtilities/composer.json
@@ -14,7 +14,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.0.0"
+        "league/flysystem": "^4.0.0"
     },
     "license": "MIT",
     "authors": [
diff --git a/src/AsyncAwsS3/composer.json b/src/AsyncAwsS3/composer.json
index 34f8bfef7..6e48948fe 100644
--- a/src/AsyncAwsS3/composer.json
+++ b/src/AsyncAwsS3/composer.json
@@ -10,7 +10,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.10.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0",
         "async-aws/s3": "^1.5 || ^2.0"
     },
diff --git a/src/AwsS3V3/composer.json b/src/AwsS3V3/composer.json
index e3c0dc7ec..dbead73b1 100644
--- a/src/AwsS3V3/composer.json
+++ b/src/AwsS3V3/composer.json
@@ -10,7 +10,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.10.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0",
         "aws/aws-sdk-php": "^3.295.10"
     },
diff --git a/src/AzureBlobStorage/composer.json b/src/AzureBlobStorage/composer.json
index cff0448ad..2120a4d42 100644
--- a/src/AzureBlobStorage/composer.json
+++ b/src/AzureBlobStorage/composer.json
@@ -7,7 +7,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.10.0",
+        "league/flysystem": "^4.0.0",
         "microsoft/azure-storage-blob": "^1.1"
     },
     "license": "MIT",
diff --git a/src/FilesystemReader.php b/src/FilesystemReader.php
index 9e4acacf9..2b2a56755 100644
--- a/src/FilesystemReader.php
+++ b/src/FilesystemReader.php
@@ -9,10 +9,6 @@
 /**
  * This interface contains everything to read from and inspect
  * a filesystem. All methods containing are non-destructive.
- *
- * @method string publicUrl(string $path, array $config = []) Will be added in 4.0
- * @method string temporaryUrl(string $path, DateTimeInterface $expiresAt, array $config = []) Will be added in 4.0
- * @method string checksum(string $path, array $config = []) Will be added in 4.0
  */
 interface FilesystemReader
 {
@@ -82,4 +78,22 @@ public function mimeType(string $path): string;
      * @throws FilesystemException
      */
     public function visibility(string $path): string;
+
+    /**
+     * @throws UnableToGeneratePublicUrl
+     * @throws FilesystemException
+     */
+    public function publicUrl(string $path, array $config = []): string;
+
+    /**
+     * @throws UnableToGeneratePublicUrl
+     * @throws FilesystemException
+     */
+    public function temporaryUrl(string $path, DateTimeInterface $expiresAt, array $config = []): string;
+
+    /**
+     * @throws UnableToGeneratePublicUrl
+     * @throws FilesystemException
+     */
+    public function checksum(string $path, array $config = []): string;
 }
diff --git a/src/Ftp/composer.json b/src/Ftp/composer.json
index e11e2ec62..ad18e8943 100644
--- a/src/Ftp/composer.json
+++ b/src/Ftp/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": "^8.0.2",
         "ext-ftp": "*",
-        "league/flysystem": "^3.0.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0"
     },
     "license": "MIT",
diff --git a/src/GoogleCloudStorage/composer.json b/src/GoogleCloudStorage/composer.json
index 8b1b5520c..d79f87d6d 100644
--- a/src/GoogleCloudStorage/composer.json
+++ b/src/GoogleCloudStorage/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": "^8.0.2",
         "google/cloud-storage": "^1.23",
-        "league/flysystem": "^3.10.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0"
     },
     "license": "MIT",
diff --git a/src/InMemory/composer.json b/src/InMemory/composer.json
index 30c45b985..828e01ba9 100644
--- a/src/InMemory/composer.json
+++ b/src/InMemory/composer.json
@@ -13,7 +13,7 @@
     "require": {
         "php": "^8.0.2",
         "ext-fileinfo": "*",
-        "league/flysystem": "^3.0.0"
+        "league/flysystem": "^4.0.0"
     },
     "license": "MIT",
     "authors": [
diff --git a/src/Local/composer.json b/src/Local/composer.json
index cd9ef2540..b59f6a914 100644
--- a/src/Local/composer.json
+++ b/src/Local/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": "^8.0.2",
         "ext-fileinfo": "*",
-        "league/flysystem": "^3.0.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0"
     },
     "license": "MIT",
diff --git a/src/PathPrefixing/composer.json b/src/PathPrefixing/composer.json
index 213b1512b..9ef71d415 100644
--- a/src/PathPrefixing/composer.json
+++ b/src/PathPrefixing/composer.json
@@ -11,7 +11,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.10.0"
+        "league/flysystem": "^4.0.0"
     },
     "license": "MIT",
     "authors": [
diff --git a/src/PhpseclibV2/composer.json b/src/PhpseclibV2/composer.json
index 85638546b..734b56e78 100644
--- a/src/PhpseclibV2/composer.json
+++ b/src/PhpseclibV2/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.0.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0",
         "phpseclib/phpseclib": "^2.0"
     },
diff --git a/src/PhpseclibV3/ConnectionProvider.php b/src/PhpseclibV3/ConnectionProvider.php
index 6f15bffe0..bc5011fc7 100644
--- a/src/PhpseclibV3/ConnectionProvider.php
+++ b/src/PhpseclibV3/ConnectionProvider.php
@@ -6,10 +6,9 @@
 
 use phpseclib3\Net\SFTP;
 
-/**
- * @method void disconnect()
- */
 interface ConnectionProvider
 {
     public function provideConnection(): SFTP;
+
+    public function disconnect(): void;
 }
diff --git a/src/PhpseclibV3/composer.json b/src/PhpseclibV3/composer.json
index dc9f86c00..96b24ad99 100644
--- a/src/PhpseclibV3/composer.json
+++ b/src/PhpseclibV3/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.0.14",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0",
         "phpseclib/phpseclib": "^3.0"
     },
diff --git a/src/ReadOnly/composer.json b/src/ReadOnly/composer.json
index aa7d95c2f..a0cb82c17 100644
--- a/src/ReadOnly/composer.json
+++ b/src/ReadOnly/composer.json
@@ -11,7 +11,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.10.0"
+        "league/flysystem": "^4.0.0"
     },
     "license": "MIT",
     "authors": [
diff --git a/src/WebDAV/composer.json b/src/WebDAV/composer.json
index da83b9397..3dd79bb27 100644
--- a/src/WebDAV/composer.json
+++ b/src/WebDAV/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "php": "^8.0.2",
-        "league/flysystem": "^3.6.0",
+        "league/flysystem": "^4.0.0",
         "sabre/dav": "^4.6.0"
     },
     "license": "MIT",
diff --git a/src/ZipArchive/composer.json b/src/ZipArchive/composer.json
index bae5759f4..67e206ad1 100644
--- a/src/ZipArchive/composer.json
+++ b/src/ZipArchive/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": "^8.0.2",
         "ext-zip": "*",
-        "league/flysystem": "^3.0.0",
+        "league/flysystem": "^4.0.0",
         "league/mime-type-detection": "^1.0.0"
     },
     "license": "MIT",