diff --git a/composer.json b/composer.json
index 17bebdd..56780b8 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": ">=5.4",
         "psr/http-message": "~1.0",
-        "http-interop/http-middleware": "^0.2",
+        "http-interop/http-middleware": "=0.2",
         "container-interop/container-interop": "^1.1",
         "mindplay/readable": "^1"
     },