diff --git a/pyproject.toml b/pyproject.toml
index 874a9d4..72f25ef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
     # Conservative bounds: floor for API stability, ceiling to block a known
     # breaking major from silently installing. Verified against the working
     # b12-venv (mcp 1.26, sentence-transformers 5.2, sqlite-vec 0.1.6, fsrs 6.3).
-    "mcp>=1.0,<2",
+    "mcp>=1.0,<3",
     # BGE-M3 (default embed model, 1024-dim multilingual cls-pooled) ships
     # as PyTorch weights via sentence-transformers. The first SessionStart
     # downloads ~2.2GB once; opt into a smaller GGUF Q8_0/Q4_K_M via