diff --git a/packages/toolbox-adk/integration.cloudbuild.yaml b/packages/toolbox-adk/integration.cloudbuild.yaml
index 8d8b5678f..353bad129 100644
--- a/packages/toolbox-adk/integration.cloudbuild.yaml
+++ b/packages/toolbox-adk/integration.cloudbuild.yaml
@@ -50,5 +50,5 @@ options:
 substitutions:
   _VERSION: '3.13'
   # Default values (can be overridden by triggers)
-  _TOOLBOX_VERSION: '1.5.0'
+  _TOOLBOX_VERSION: '1.6.0'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-core/integration.cloudbuild.yaml b/packages/toolbox-core/integration.cloudbuild.yaml
index 17e388483..3dc6141ba 100644
--- a/packages/toolbox-core/integration.cloudbuild.yaml
+++ b/packages/toolbox-core/integration.cloudbuild.yaml
@@ -45,5 +45,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '1.5.0'
+  _TOOLBOX_VERSION: '1.6.0'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-langchain/integration.cloudbuild.yaml b/packages/toolbox-langchain/integration.cloudbuild.yaml
index 39a34b5fe..db9cbc135 100644
--- a/packages/toolbox-langchain/integration.cloudbuild.yaml
+++ b/packages/toolbox-langchain/integration.cloudbuild.yaml
@@ -49,5 +49,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '1.5.0'
+  _TOOLBOX_VERSION: '1.6.0'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-llamaindex/integration.cloudbuild.yaml b/packages/toolbox-llamaindex/integration.cloudbuild.yaml
index 0d31e0d69..3a2e609aa 100644
--- a/packages/toolbox-llamaindex/integration.cloudbuild.yaml
+++ b/packages/toolbox-llamaindex/integration.cloudbuild.yaml
@@ -49,5 +49,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '1.5.0'
+  _TOOLBOX_VERSION: '1.6.0'
   _TOOLBOX_MANIFEST_VERSION: '34'