diff --git a/src/RPC/RPC.php b/src/RPC/RPC.php
index e31d91b..1e07e9f 100644
--- a/src/RPC/RPC.php
+++ b/src/RPC/RPC.php
@@ -112,6 +112,8 @@ public static function create(string $connection, CodecInterface $codec = null):
      * @return RPCInterface
      *
      * @psalm-suppress UndefinedClass
+     * @psalm-suppress DeprecatedMethod
+     * @deprecated
      */
     public static function fromEnvironment(EnvironmentInterface $env, CodecInterface $codec = null): RPCInterface
     {
@@ -125,6 +127,8 @@ public static function fromEnvironment(EnvironmentInterface $env, CodecInterface
      * @return RPCInterface
      *
      * @psalm-suppress UndefinedClass
+     * @psalm-suppress DeprecatedMethod
+     * @deprecated
      */
     public static function fromGlobals(CodecInterface $codec = null): RPCInterface
     {