php: bump version
diff --git a/composer.json b/composer.json
index 1d78a2c..61f81e0 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "grpc/grpc",
   "type": "library",
   "description": "gRPC library for PHP",
-  "version": "0.5.1",
+  "version": "0.6.0",
   "keywords": ["rpc"],
   "homepage": "http://grpc.io",
   "license": "BSD-3-Clause",