diff --git a/composer.json b/composer.json
index 3b00b42..579f428 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,6 @@
         }
     },
     "require": {
-        "google/protobuf": "^3.21"
+        "google/protobuf": "^3.19"
     }
 }