diff --git a/pyproject.toml b/pyproject.toml
index 5d264d5..024ba11 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ dependencies = [
     "temporalio==1.24.0",
     "aiohttp==3.13.3",
     "pydantic==2.12.4",
-    "google-genai==1.66.0",
+    "google-genai==1.73.1",
     "python-dotenv>=1.2.2",
 ]
 
diff --git a/uv.lock b/uv.lock
index 72de0b7..acb14d5 100644
--- a/uv.lock
+++ b/uv.lock
@@ -521,7 +521,7 @@ requests = [
 
 [[package]]
 name = "google-genai"
-version = "1.66.0"
+version = "1.73.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -535,9 +535,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "websockets" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/9b/ba/0b343b0770d4710ad2979fd9301d7caa56c940174d5361ed4a7cc4979241/google_genai-1.66.0.tar.gz", hash = "sha256:ffc01647b65046bca6387320057aa51db0ad64bcc72c8e3e914062acfa5f7c49", size = 504386, upload-time = "2026-03-04T22:15:28.156Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/3d/d8/40f5f107e5a2976bbac52d421f04d14fc221b55a8f05e66be44b2f739fe6/google_genai-1.73.1.tar.gz", hash = "sha256:b637e3a3b9e2eccc46f27136d470165803de84eca52abfed2e7352081a4d5a15", size = 530998, upload-time = "2026-04-14T21:06:19.153Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d1/dd/403949d922d4e261b08b64aaa132af4e456c3b15c8e2a2d9e6ef693f66e2/google_genai-1.66.0-py3-none-any.whl", hash = "sha256:7f127a39cf695277104ce4091bb26e417c59bb46e952ff3699c3a982d9c474ee", size = 732174, upload-time = "2026-03-04T22:15:26.63Z" },
+    { url = "https://files.pythonhosted.org/packages/65/af/508e0528015240d710c6763f7c89ff44fab9a94a80b4377e265d692cbfd6/google_genai-1.73.1-py3-none-any.whl", hash = "sha256:af2d2287d25e42a187de19811ef33beb2e347c7e2bdb4dc8c467d78254e43a2c", size = 783595, upload-time = "2026-04-14T21:06:17.464Z" },
 ]
 
 [[package]]
@@ -1134,7 +1134,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "aiohttp", specifier = "==3.13.3" },
-    { name = "google-genai", specifier = "==1.66.0" },
+    { name = "google-genai", specifier = "==1.73.1" },
     { name = "pydantic", specifier = "==2.12.4" },
     { name = "python-dotenv", specifier = ">=1.2.2" },
     { name = "temporalio", specifier = "==1.24.0" },