diff --git a/integrations/google_vertex/pyproject.toml b/integrations/google_vertex/pyproject.toml
index 71158f712..747bbecbf 100644
--- a/integrations/google_vertex/pyproject.toml
+++ b/integrations/google_vertex/pyproject.toml
@@ -22,12 +22,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = [
-  "haystack-ai",
-  "google-cloud-aiplatform>=1.38",
-  "pyarrow>3",
-  "protobuf<5.28",
-]
+dependencies = ["haystack-ai", "google-cloud-aiplatform>=1.38", "pyarrow>3"]
 
 [project.urls]
 Documentation = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/google_vertex#readme"