diff --git a/pyproject.toml b/pyproject.toml
index 33b50b9a..fe6b78f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ dependencies = [
   "google-cloud-spanner>=3.56.0, <4.0.0",                    # For Spanner database
   "google-cloud-speech>=2.30.0, <3.0.0",                     # For Audio Transcription
   "google-cloud-storage>=2.18.0, <4.0.0",                    # For GCS Artifact service
-  "google-genai>=1.51.0, <2.0.0",                            # Google GenAI SDK
+  "google-genai>=1.55.0, <2.0.0",                            # Google GenAI SDK
   "graphviz>=0.20.2, <1.0.0",                                # Graphviz for graph rendering
   "jsonschema>=4.23.0, <5.0.0",                              # Agent Builder config validation
   "mcp>=1.10.0, <2.0.0",                                     # For MCP Toolset