diff --git a/requirements/base.txt b/requirements/base.txt
index 55879417c..5befc2866 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -56,7 +56,7 @@ openai>=2.43.0,<3  # https://github.com/openai/openai-python (pydantic-ai 1.x re
 # one of those provider SDKs disappearing from PyPI — as ``mistralai`` did
 # on 2026-05-12, where ``pypi.org/pypi/mistralai/json`` started 404ing —
 # breaks the entire install chain. Narrow extras = stable resolves.
-pydantic-ai-slim[openai,anthropic,google,mcp]>=1.107.0,<2  # see issue #1451 before bumping the upper bound
+pydantic-ai-slim[openai,anthropic,google,mcp]>=2.0.0,<3  # see issue #1451 before bumping the upper bound
 spacy
 pdfplumber>=0.11.10  # https://github.com/jsvine/pdfplumber - PDF token extraction
 shapely>=2.1.2  # https://github.com/shapely/shapely - spatial operations for bbox intersection