diff --git a/pyproject.toml b/pyproject.toml
index 021d5b89..593e62d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = []
 # Treat the same as NPM's `dependencies`
 [project.optional-dependencies]
 compat = ["six>=1.17.0"]
-ai = ["httpx==0.28.1", "langchain>=1.2.18", "mcp>=1.27.1", "pydantic>=2.13.4"]
+ai = ["httpx==0.28.1", "langchain>=1.2.18", "mcp>=1.27.1,<2", "pydantic>=2.13.4"]
 anthropic = ["splunk-sdk[ai]>=3.0.0", "langchain-anthropic>=1.4.3"]
 openai = ["splunk-sdk[ai]>=3.0.0", "langchain-openai>=1.2.1"]
 google = [
diff --git a/uv.lock b/uv.lock
index e6c52780..6cd05651 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1860,7 +1860,7 @@ requires-dist = [
     { name = "langchain-anthropic", marker = "extra == 'anthropic'", specifier = ">=1.4.3" },
     { name = "langchain-google-genai", marker = "extra == 'google'", specifier = "==4.2.2" },
     { name = "langchain-openai", marker = "extra == 'openai'", specifier = ">=1.2.1" },
-    { name = "mcp", marker = "extra == 'ai'", specifier = ">=1.27.1" },
+    { name = "mcp", marker = "extra == 'ai'", specifier = ">=1.27.1,<2" },
     { name = "pydantic", marker = "extra == 'ai'", specifier = ">=2.13.4" },
     { name = "six", marker = "extra == 'compat'", specifier = ">=1.17.0" },
     { name = "splunk-sdk", extras = ["ai"], marker = "extra == 'anthropic'", specifier = ">=3.0.0" },