diff --git a/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap b/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
index 0962b1b0e..a97bbeb1d 100644
--- a/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
+++ b/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
@@ -1164,7 +1164,7 @@ description = "AgentCore A2A Agent using Google ADK"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "a2a-sdk >= 0.2.0",
+    "a2a-sdk >= 0.2.0, < 1.0.0",
     "aws-opentelemetry-distro",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "google-adk >= 1.0.0",
@@ -1525,7 +1525,7 @@ description = "AgentCore A2A Agent using LangChain + LangGraph"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "a2a-sdk >= 0.2.0",
+    "a2a-sdk >= 0.2.0, < 1.0.0",
     {{#if (eq modelProvider "Anthropic")}}"langchain-anthropic >= 0.3.0",
     {{/if}}{{#if (eq modelProvider "Bedrock")}}"langchain-aws >= 0.2.0",
     {{/if}}{{#if (eq modelProvider "Gemini")}}"langchain-google-genai >= 2.0.0",
@@ -1869,7 +1869,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     {{#if (eq modelProvider "Anthropic")}}"anthropic >= 0.30.0",
-    {{/if}}"a2a-sdk[all] >= 0.2.0",
+    {{/if}}"a2a-sdk[all] >= 0.2.0, < 1.0.0",
     "aws-opentelemetry-distro",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "botocore[crt] >= 1.35.0",
diff --git a/src/assets/python/a2a/googleadk/base/pyproject.toml b/src/assets/python/a2a/googleadk/base/pyproject.toml
index 7fcb75167..426150722 100644
--- a/src/assets/python/a2a/googleadk/base/pyproject.toml
+++ b/src/assets/python/a2a/googleadk/base/pyproject.toml
@@ -9,7 +9,7 @@ description = "AgentCore A2A Agent using Google ADK"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "a2a-sdk >= 0.2.0",
+    "a2a-sdk >= 0.2.0, < 1.0.0",
     "aws-opentelemetry-distro",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "google-adk >= 1.0.0",
diff --git a/src/assets/python/a2a/langchain_langgraph/base/pyproject.toml b/src/assets/python/a2a/langchain_langgraph/base/pyproject.toml
index ef0715758..c906639ed 100644
--- a/src/assets/python/a2a/langchain_langgraph/base/pyproject.toml
+++ b/src/assets/python/a2a/langchain_langgraph/base/pyproject.toml
@@ -9,7 +9,7 @@ description = "AgentCore A2A Agent using LangChain + LangGraph"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "a2a-sdk >= 0.2.0",
+    "a2a-sdk >= 0.2.0, < 1.0.0",
     {{#if (eq modelProvider "Anthropic")}}"langchain-anthropic >= 0.3.0",
     {{/if}}{{#if (eq modelProvider "Bedrock")}}"langchain-aws >= 0.2.0",
     {{/if}}{{#if (eq modelProvider "Gemini")}}"langchain-google-genai >= 2.0.0",
diff --git a/src/assets/python/a2a/strands/base/pyproject.toml b/src/assets/python/a2a/strands/base/pyproject.toml
index e062c5564..37f69c01a 100644
--- a/src/assets/python/a2a/strands/base/pyproject.toml
+++ b/src/assets/python/a2a/strands/base/pyproject.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     {{#if (eq modelProvider "Anthropic")}}"anthropic >= 0.30.0",
-    {{/if}}"a2a-sdk[all] >= 0.2.0",
+    {{/if}}"a2a-sdk[all] >= 0.2.0, < 1.0.0",
     "aws-opentelemetry-distro",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "botocore[crt] >= 1.35.0",