diff --git a/pyproject.toml b/pyproject.toml
index 23fbd2b..2f4dcf6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ azure-identity = "^1.16.0"
 celery = "^5.3.5"
 databases = { version = "^0.7.0", extras = ["postgresql"] }
 fastapi = "^0.111.0"
-fastapimsal = { git = "https://github.com/alan-turing-institute/fastapimsal", branch = "update-pydantic" }
+fastapimsal = { git = "https://github.com/alan-turing-institute/fastapimsal", tag = "0.6.0" }
 Jinja2 = "^3.1.3"
 myst-parser = {version = "^3.0.1", optional = true}
 numpy = "<2.0.0"