diff --git a/setup.py b/setup.py
index de356dcdd4..b334fb5417 100644
--- a/setup.py
+++ b/setup.py
@@ -327,7 +327,7 @@
         "google-cloud-bigquery >= 1.15.0, < 4.0.0, !=3.20.0",
         "google-cloud-resource-manager >= 1.3.3, < 3.0.0",
         "google-genai >= 1.37.0, <2.0.0; python_version<'3.10'",
-        "google-genai >= 1.66.0, <2.0.0; python_version>='3.10'",
+        "google-genai >= 1.75.0, <2.0.0; python_version>='3.10'",
     )
     + genai_requires,
     extras_require={
diff --git a/testing/constraints-3.10.txt b/testing/constraints-3.10.txt
index b931b4f348..2daf9aedbf 100644
--- a/testing/constraints-3.10.txt
+++ b/testing/constraints-3.10.txt
@@ -2,7 +2,7 @@
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
 google-api-core==2.21.0 # Tests google-api-core with rest async support
-google-auth==2.47.0 # Tests google-auth with rest async support
+google-auth==2.49.0 # Tests google-auth with rest async support
 proto-plus==1.22.3
 protobuf
 mock==4.0.2
diff --git a/testing/constraints-3.11.txt b/testing/constraints-3.11.txt
index 205412f0e5..d1ea1a5a71 100644
--- a/testing/constraints-3.11.txt
+++ b/testing/constraints-3.11.txt
@@ -2,7 +2,7 @@
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
 google-api-core==2.21.0 # Tests google-api-core with rest async support
-google-auth==2.47.0 # Tests google-auth with rest async support
+google-auth==2.49.0 # Tests google-auth with rest async support
 proto-plus
 protobuf
 mock==4.0.2
diff --git a/testing/constraints-3.12.txt b/testing/constraints-3.12.txt
index 35b3def89d..f629feed03 100644
--- a/testing/constraints-3.12.txt
+++ b/testing/constraints-3.12.txt
@@ -2,7 +2,7 @@
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
 google-api-core==2.21.0 # Tests google-api-core with rest async support
-google-auth==2.47.0 # Tests google-auth with rest async support
+google-auth==2.49.0 # Tests google-auth with rest async support
 proto-plus
 mock==4.0.2
 google-cloud-storage==3.0.0 # Updated to v3.x, backward compatible with v2.x via wrapper
diff --git a/testing/constraints-3.13.txt b/testing/constraints-3.13.txt
index ecc94df9ac..8cdb9e7597 100644
--- a/testing/constraints-3.13.txt
+++ b/testing/constraints-3.13.txt
@@ -2,7 +2,7 @@
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
 google-api-core==2.27.0 # Tests google-api-core with rest async support
-google-auth==2.47.0 # Tests google-auth with rest async support
+google-auth==2.49.0 # Tests google-auth with rest async support
 proto-plus
 mock==4.0.2
 google-cloud-storage==3.10.0 # Updated to v3.x, backward compatible with v2.x via wrapper
diff --git a/testing/constraints-3.14.txt b/testing/constraints-3.14.txt
index d3d2ea38b7..bcce50654e 100644
--- a/testing/constraints-3.14.txt
+++ b/testing/constraints-3.14.txt
@@ -2,7 +2,7 @@
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
 google-api-core==2.27.0
-google-auth==2.47.0 # Tests google-auth with rest async support
+google-auth==2.49.0 # Tests google-auth with rest async support
 proto-plus
 mock==4.0.2
 google-cloud-storage==3.10.0 # Updated for Python 3.14 compatibility