diff --git a/composer.json b/composer.json
index 5d96150..8cecde7 100644
--- a/composer.json
+++ b/composer.json
@@ -5,10 +5,10 @@
     "license": "MIT",
     "require": {
         "php": "^7.0",
-        "http-interop/http-server-middleware": "^1.0",
         "recoil/react": "^1.0",
         "recoil/recoil": "^1.0",
-        "nikic/php-parser": "^3.1"
+        "nikic/php-parser": "^3.1",
+        "psr/http-server-middleware": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.0",
diff --git a/src/GroupedPSR15Middleware.php b/src/GroupedPSR15Middleware.php
index aec64b7..3a9e4c0 100644
--- a/src/GroupedPSR15Middleware.php
+++ b/src/GroupedPSR15Middleware.php
@@ -2,9 +2,9 @@
 
 namespace FriendsOfReact\Http\Middleware\Psr15Adapter;
 
-use Interop\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 use React\EventLoop\LoopInterface;
 use React\Promise;
 use Recoil\React\ReactKernel;
diff --git a/src/PSR15Middleware.php b/src/PSR15Middleware.php
index abf89cc..371bf7e 100644
--- a/src/PSR15Middleware.php
+++ b/src/PSR15Middleware.php
@@ -2,9 +2,9 @@
 
 namespace FriendsOfReact\Http\Middleware\Psr15Adapter;
 
-use Interop\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 use React\EventLoop\LoopInterface;
 use React\Promise;
 use Recoil\React\ReactKernel;
diff --git a/src/YieldingMiddlewareFactory.php b/src/YieldingMiddlewareFactory.php
index 1feff2e..9ba37d9 100644
--- a/src/YieldingMiddlewareFactory.php
+++ b/src/YieldingMiddlewareFactory.php
@@ -2,7 +2,6 @@
 
 namespace FriendsOfReact\Http\Middleware\Psr15Adapter;
 
-use Interop\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Expr\Variable;
 use PhpParser\Node\Expr\Yield_;
@@ -10,6 +9,7 @@
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\ParserFactory;
 use PhpParser\PrettyPrinter\Standard;
+use Psr\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
 
 final class YieldingMiddlewareFactory
 {
diff --git a/tests/PSR15TestMiddleware.php b/tests/PSR15TestMiddleware.php
index 799e268..dbe7463 100644
--- a/tests/PSR15TestMiddleware.php
+++ b/tests/PSR15TestMiddleware.php
@@ -2,10 +2,10 @@
 
 namespace FriendsOfReact\Tests\Http\Middleware\Psr15Adapter;
 
-use Interop\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
-use Interop\Http\Server\RequestHandlerInterface;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface as PSR15MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 
 final class PSR15TestMiddleware implements PSR15MiddlewareInterface
 {