diff --git a/pyproject.toml b/pyproject.toml
index 87886d6..b7bb9b3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,11 +39,11 @@ crawl4ai = ["Crawl4AI>=0.7.3"]
 # `hyperresearch/mcp/server.py` builds every tool on. Without the bound a
 # fresh `pip install hyperresearch[mcp]` resolves 2.x and `hyperresearch mcp`
 # dies on import, reporting the extra as missing when it is in fact installed.
-mcp = ["mcp>=1.6,<2"]
+mcp = ["mcp>=1.6,<3"]
 # The Parallel provider needs the Streamable HTTP client introduced in mcp 1.8.
 # Keep this separate so installing the Hyperresearch MCP server does not force
 # an unrelated SDK upgrade.
-parallel = ["mcp>=1.8,<2"]
+parallel = ["mcp>=1.8,<3"]
 exa = ["exa-py>=2.0.0"]
 tavily = ["tavily-python>=0.3"]
 watch = ["watchdog>=4.0"]
@@ -54,7 +54,7 @@ dev = [
     "ruff>=0.3",
     "mypy>=1.8",
     "exa-py>=2.0.0",
-    "mcp>=1.6,<2",
+    "mcp>=1.6,<3",
     "types-PyYAML>=6.0.12",
     "watchdog>=4.0",
 ]