diff --git a/src/microsim/schema/settings.py b/src/microsim/schema/settings.py
index 6835c4f..e056e13 100644
--- a/src/microsim/schema/settings.py
+++ b/src/microsim/schema/settings.py
@@ -50,7 +50,7 @@ class Settings(SimBaseModel, BaseSettings):
             "The maximum number of PSFs that will be stored in the in-memory cache, "
             "which follows the LRU caching strategy. Note, this setting will only take "
             "effect by modifying the equivalent environment variable prior to "
-            f"importing microsim."
+            "importing microsim."
         ),
         frozen=True,
     )