diff --git a/packages/toolbox-adk/integration.cloudbuild.yaml b/packages/toolbox-adk/integration.cloudbuild.yaml
index 11d99cfc9..00a60e02f 100644
--- a/packages/toolbox-adk/integration.cloudbuild.yaml
+++ b/packages/toolbox-adk/integration.cloudbuild.yaml
@@ -55,5 +55,5 @@ options:
 substitutions:
   _VERSION: '3.13'
   # Default values (can be overridden by triggers)
-  _TOOLBOX_VERSION: '0.26.0'
+  _TOOLBOX_VERSION: '1.13.1'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-core/integration.cloudbuild.yaml b/packages/toolbox-core/integration.cloudbuild.yaml
index 6c346f833..b595a202e 100644
--- a/packages/toolbox-core/integration.cloudbuild.yaml
+++ b/packages/toolbox-core/integration.cloudbuild.yaml
@@ -54,5 +54,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '0.26.0'
+  _TOOLBOX_VERSION: '1.13.1'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-langchain/integration.cloudbuild.yaml b/packages/toolbox-langchain/integration.cloudbuild.yaml
index adc59d874..9f9466352 100644
--- a/packages/toolbox-langchain/integration.cloudbuild.yaml
+++ b/packages/toolbox-langchain/integration.cloudbuild.yaml
@@ -54,5 +54,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '0.26.0'
+  _TOOLBOX_VERSION: '1.13.1'
   _TOOLBOX_MANIFEST_VERSION: '34'
diff --git a/packages/toolbox-llamaindex/integration.cloudbuild.yaml b/packages/toolbox-llamaindex/integration.cloudbuild.yaml
index e723a655a..7e19c69f3 100644
--- a/packages/toolbox-llamaindex/integration.cloudbuild.yaml
+++ b/packages/toolbox-llamaindex/integration.cloudbuild.yaml
@@ -54,5 +54,5 @@ options:
   logging: CLOUD_LOGGING_ONLY
 substitutions:
   _VERSION: '3.13'
-  _TOOLBOX_VERSION: '0.26.0'
+  _TOOLBOX_VERSION: '1.13.1'
   _TOOLBOX_MANIFEST_VERSION: '34'