diff --git a/pyproject.toml b/pyproject.toml
index ff333770..7331cc9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ classifiers = [
   "Operating System :: OS Independent",
 ]
 dependencies = [
-  "labthings-fastapi[server]",
+  "labthings-fastapi[server] ~= 0.0.4",
   "labthings-sangaboard",
   "camera-stage-mapping ~= 0.1.6",
   "numpy ~= 1.20",