diff --git a/composer.lock b/composer.lock
index 2fb617a..d3e7c57 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1169,25 +1169,25 @@
         },
         {
             "name": "slim/psr7",
-            "version": "1.4",
+            "version": "1.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/slimphp/Slim-Psr7.git",
-                "reference": "0dca983ca32a26f4a91fb11173b7b9eaee29e9d6"
+                "reference": "a47b43a8da7c0208b4c228af0cb29ea36080635a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/slimphp/Slim-Psr7/zipball/0dca983ca32a26f4a91fb11173b7b9eaee29e9d6",
-                "reference": "0dca983ca32a26f4a91fb11173b7b9eaee29e9d6",
+                "url": "https://api.github.com/repos/slimphp/Slim-Psr7/zipball/a47b43a8da7c0208b4c228af0cb29ea36080635a",
+                "reference": "a47b43a8da7c0208b4c228af0cb29ea36080635a",
                 "shasum": ""
             },
             "require": {
                 "fig/http-message-util": "^1.1.5",
-                "php": "^7.2 || ^8.0",
+                "php": "^7.3 || ^8.0",
                 "psr/http-factory": "^1.0",
                 "psr/http-message": "^1.0",
-                "ralouphie/getallheaders": "^3",
-                "symfony/polyfill-php80": "^1.22"
+                "ralouphie/getallheaders": "^3.0",
+                "symfony/polyfill-php80": "^1.23"
             },
             "provide": {
                 "psr/http-factory-implementation": "1.0",
@@ -1198,10 +1198,11 @@
                 "ext-json": "*",
                 "http-interop/http-factory-tests": "^0.9.0",
                 "php-http/psr7-integration-tests": "dev-master",
-                "phpstan/phpstan": "^0.12",
-                "phpunit/phpunit": "^8.5 || ^9.5",
-                "squizlabs/php_codesniffer": "^3.6",
-                "weirdan/prophecy-shim": "^1.0 || ^2.0.2"
+                "phpspec/prophecy": "^1.14",
+                "phpspec/prophecy-phpunit": "^2.0",
+                "phpstan/phpstan": "^0.12.99",
+                "phpunit/phpunit": "^9.5",
+                "squizlabs/php_codesniffer": "^3.6"
             },
             "type": "library",
             "autoload": {
@@ -1244,9 +1245,9 @@
             ],
             "support": {
                 "issues": "https://github.com/slimphp/Slim-Psr7/issues",
-                "source": "https://github.com/slimphp/Slim-Psr7/tree/1.4"
+                "source": "https://github.com/slimphp/Slim-Psr7/tree/1.5"
             },
-            "time": "2021-05-08T18:22:56+00:00"
+            "time": "2021-09-22T04:33:00+00:00"
         },
         {
             "name": "slim/slim",
@@ -7070,5 +7071,5 @@
         "ext-zip": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.1.0"
 }