diff --git a/python/agents/ai-security-agent/pyproject.toml b/python/agents/ai-security-agent/pyproject.toml
index b5ecd6759..5ff94be89 100644
--- a/python/agents/ai-security-agent/pyproject.toml
+++ b/python/agents/ai-security-agent/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = [
     "google-adk>=1.18.0",
     "google-genai>=1.9.0",
     "google-cloud-aiplatform>=1.127.0",
-    "python-dotenv>=1.2.1",
+    "python-dotenv>=1.2.2",
     "pyyaml>=6.0.3",
     "tenacity>=9.1.2",
 ]
diff --git a/python/agents/brand-aligned-presentations/pyproject.toml b/python/agents/brand-aligned-presentations/pyproject.toml
index 90a20ab99..6191601ce 100644
--- a/python/agents/brand-aligned-presentations/pyproject.toml
+++ b/python/agents/brand-aligned-presentations/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
     "pillow==11.3.0",
     "pydantic>=2.12.0",
     "pydantic-settings==2.13.1",
-    "python-dotenv==1.1.1",
+    "python-dotenv==1.2.2",
     "google-cloud-storage==2.19.0",
     "google-genai>=1.68.0",
     "matplotlib==3.10.6",
diff --git a/python/agents/data-science/pyproject.toml b/python/agents/data-science/pyproject.toml
index 9f95c20b8..c56ac2227 100644
--- a/python/agents/data-science/pyproject.toml
+++ b/python/agents/data-science/pyproject.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 
 dependencies = [
-    "python-dotenv>=1.0.1",
+    "python-dotenv>=1.2.2",
     "google-adk>=1.14",
     "immutabledict>=4.2.1",
     "sqlglot>=26.10.1",
diff --git a/python/agents/hierarchical-workflow-automation/requirements.txt b/python/agents/hierarchical-workflow-automation/requirements.txt
index 67dcd8ff8..06db374d5 100644
--- a/python/agents/hierarchical-workflow-automation/requirements.txt
+++ b/python/agents/hierarchical-workflow-automation/requirements.txt
@@ -7,7 +7,7 @@ annotated-types==0.7.0
 anyio==4.10.0
 asyncio-mqtt==0.16.2
 attrs==25.3.0
-Authlib==1.6.3
+Authlib==1.6.11
 black==25.1.0
 Bottleneck==1.6.0
 cachetools==5.5.2
@@ -119,7 +119,7 @@ pytest==8.4.2
 pytest-asyncio==1.1.0
 pytest-mock==3.14.1
 python-dateutil==2.9.0.post0
-python-dotenv==1.1.1
+python-dotenv==1.2.2
 python-multipart==0.0.20
 PyYAML==6.0.2
 referencing==0.36.2
diff --git a/python/agents/parallel_task_decomposition_execution/pyproject.toml b/python/agents/parallel_task_decomposition_execution/pyproject.toml
index 5083e4d4c..eca374f04 100644
--- a/python/agents/parallel_task_decomposition_execution/pyproject.toml
+++ b/python/agents/parallel_task_decomposition_execution/pyproject.toml
@@ -11,7 +11,7 @@ requires-python = ">=3.10"
 
 dependencies = [
     "google-adk==1.19.0",
-    "python-dotenv==1.2.1",
+    "python-dotenv==1.2.2",
     "google-cloud-aiplatform[adk,agent-engines]==1.128.0",
     "mcp==1.21.2",
 ]
diff --git a/python/agents/parallel_task_decomposition_execution/requirements.txt b/python/agents/parallel_task_decomposition_execution/requirements.txt
index 9a534b098..bee7f68a3 100644
--- a/python/agents/parallel_task_decomposition_execution/requirements.txt
+++ b/python/agents/parallel_task_decomposition_execution/requirements.txt
@@ -1,5 +1,5 @@
 google-adk==1.19.0
-python-dotenv==1.2.1
+python-dotenv==1.2.2
 google-cloud-aiplatform==1.128.0
 google-cloud-aiplatform[adk,agent_engines]
 mcp==1.21.2
diff --git a/python/agents/plumber-data-engineering-assistant/pyproject.toml b/python/agents/plumber-data-engineering-assistant/pyproject.toml
index 583b82582..8308f28dc 100644
--- a/python/agents/plumber-data-engineering-assistant/pyproject.toml
+++ b/python/agents/plumber-data-engineering-assistant/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
     "google-cloud-storage==2.19.0",
     "google-generativeai==0.8.5",
     "Pillow==11.3.0",
-    "python-dotenv==1.1.1",
+    "python-dotenv==1.2.2",
     "requests==2.32.4",
     "apache-beam[gcp]==2.69.0",
 ]