diff --git a/explain/claude_code_plugin/deps.py b/explain/claude_code_plugin/deps.py
index 2e09418..4aca017 100644
--- a/explain/claude_code_plugin/deps.py
+++ b/explain/claude_code_plugin/deps.py
@@ -68,6 +68,8 @@ def _install_deps(deps_dir: Path) -> None:
         "install",
         "--quiet",
         "--upgrade",
+        "--python",
+        sys.executable,
         "--target",
         str(deps_dir),
     ] + deps