diff --git a/pyproject.toml b/pyproject.toml
index 6b33a6c47..f71528519 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ mongoengine = [  # TODO: seems out-of-date/unmaintained; replace or deprecate?
 pymongo = ["pymongo>=3.7.0"]
 peewee = [
     "peewee>=3.14.0",
-    "wtf-peewee>=3.0.4"
+    "wtf-peewee==3.0.4"
 ]
 s3 = ["boto"]  # TODO: migrate to boto3
 azure-blob-storage = ["azure-storage-blob<=3"]  # TODO: update to v12+