diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c6a5bc..5197606 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 3.8.0 - 2023-09-10
+
+### Deprecated
+
+- `Innmind\OperatingSystem\CurrentProcess::fork()`
+- `Innmind\OperatingSystem\CurrentProcess::children()`
+- `Innmind\OperatingSystem\CurrentProcess\Children`
+- `Innmind\OperatingSystem\CurrentProcess\Child`
+- `Innmind\OperatingSystem\CurrentProcess\ForkFailed`
+
 ## 3.7.0 - 2023-02-25
 
 ### Added
diff --git a/src/Config.php b/src/Config.php
index e17d16a..230151d 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -87,6 +87,8 @@ public function withEnvironmentPath(EnvironmentPath $path): self
     }
 
     /**
+     * @psalm-mutation-free
+     *
      * @param positive-int $max
      */
     public function limitHttpConcurrencyTo(int $max): self
diff --git a/src/CurrentProcess.php b/src/CurrentProcess.php
index 0bb2f38..1c8fbed 100644
--- a/src/CurrentProcess.php
+++ b/src/CurrentProcess.php
@@ -22,9 +22,17 @@ interface CurrentProcess
     public function id(): Pid;
 
     /**
+     * @deprecated This method will be removed in the next major version
+     * @psalm-suppress DeprecatedClass
+     *
      * @return Either<ForkFailed|Child, SideEffect> SideEffect represent the child side
      */
     public function fork(): Either;
+
+    /**
+     * @deprecated This method will be removed in the next major version
+     * @psalm-suppress DeprecatedClass
+     */
     public function children(): Children;
     public function signals(): Signals;
     public function halt(Period $period): void;
diff --git a/src/CurrentProcess/Child.php b/src/CurrentProcess/Child.php
index 456a8b6..4f768c5 100644
--- a/src/CurrentProcess/Child.php
+++ b/src/CurrentProcess/Child.php
@@ -8,6 +8,9 @@
     ExitCode,
 };
 
+/**
+ * @deprecated This Class will be removed in the next major version
+ */
 final class Child
 {
     private Pid $pid;
diff --git a/src/CurrentProcess/Children.php b/src/CurrentProcess/Children.php
index 523623a..7806254 100644
--- a/src/CurrentProcess/Children.php
+++ b/src/CurrentProcess/Children.php
@@ -13,6 +13,10 @@
     Maybe,
 };
 
+/**
+ * @deprecated This Class will be removed in the next major version
+ * @psalm-suppress DeprecatedClass
+ */
 final class Children
 {
     /** @var Map<int<2, max>, Child> */
diff --git a/src/CurrentProcess/ForkFailed.php b/src/CurrentProcess/ForkFailed.php
index ef42881..41331ac 100644
--- a/src/CurrentProcess/ForkFailed.php
+++ b/src/CurrentProcess/ForkFailed.php
@@ -4,6 +4,7 @@
 namespace Innmind\OperatingSystem\CurrentProcess;
 
 /**
+ * @deprecated This class will be removed in the next major version
  * @psalm-immutable
  */
 final class ForkFailed
diff --git a/src/CurrentProcess/Generic.php b/src/CurrentProcess/Generic.php
index 17a91f7..0f30c26 100644
--- a/src/CurrentProcess/Generic.php
+++ b/src/CurrentProcess/Generic.php
@@ -18,7 +18,10 @@
 final class Generic implements CurrentProcess
 {
     private Halt $halt;
-    /** @var Set<Child> */
+    /**
+     * @psalm-suppress DeprecatedClass
+     * @var Set<Child>
+     */
     private Set $children;
     private ?Handler $signalsHandler = null;
     private ?Signals\Wrapper $signals = null;
@@ -26,7 +29,10 @@ final class Generic implements CurrentProcess
     private function __construct(Halt $halt)
     {
         $this->halt = $halt;
-        /** @var Set<Child> */
+        /**
+         * @psalm-suppress DeprecatedClass
+         * @var Set<Child>
+         */
         $this->children = Set::of();
     }
 
@@ -45,6 +51,7 @@ public function fork(): Either
     {
         /**
          * @psalm-suppress ArgumentTypeCoercion
+         * @psalm-suppress DeprecatedClass
          * @var Either<ForkFailed|Child, SideEffect>
          */
         $result = match ($pid = \pcntl_fork()) {
@@ -53,6 +60,9 @@ public function fork(): Either
             default => Either::left(Child::of(new Pid($pid))),
         };
 
+        /**
+         * @psalm-suppress DeprecatedClass
+         */
         return $result
             ->map(function($sideEffect) {
                 $this->children = $this->children->clear();
@@ -67,8 +77,12 @@ public function fork(): Either
             });
     }
 
+    /**
+     * @psalm-suppress DeprecatedClass
+     */
     public function children(): Children
     {
+        /** @psalm-suppress DeprecatedClass */
         return Children::of(...$this->children->toList());
     }
 
@@ -89,6 +103,9 @@ public function memory(): Bytes
         return new Bytes(\memory_get_usage());
     }
 
+    /**
+     * @psalm-suppress DeprecatedClass
+     */
     private function register(Child $child): Child
     {
         $this->children = ($this->children)($child);
diff --git a/src/CurrentProcess/Logger.php b/src/CurrentProcess/Logger.php
index c3d8f08..9ffc0b8 100644
--- a/src/CurrentProcess/Logger.php
+++ b/src/CurrentProcess/Logger.php
@@ -43,6 +43,10 @@ public function fork(): Either
     {
         $this->logger->debug('Forking process');
 
+        /**
+         * @psalm-suppress DeprecatedMethod
+         * @psalm-suppress DeprecatedClass
+         */
         return $this
             ->process
             ->fork()
@@ -58,8 +62,12 @@ public function fork(): Either
             });
     }
 
+    /**
+     * @psalm-suppress DeprecatedClass
+     */
     public function children(): Children
     {
+        /** @psalm-suppress DeprecatedMethod */
         return $this->process->children();
     }