diff --git a/pyproject.toml b/pyproject.toml
index fc1bdb0..b6bda4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -170,7 +170,7 @@ mongodb = [
   "commons-codec[mongodb,zyp]>=0.0.18",
   "cratedb-toolkit[io]",
   "orjson<4,>=3.3.1",
-  "pymongo<5,>=3.10.1",
+  "pymongo<4.9,>=3.10.1",
   "python-bsonjs<0.5",
   "rich<14,>=3.3.2",
   "undatum<1.1",
@@ -178,7 +178,7 @@ mongodb = [
 pymongo = [
   "jessiql==1.0.0rc1",
   "pandas==2.1.*",
-  "pymongo==4.8.*",
+  "pymongo<4.9",
   "sqlalchemy<2",
 ]
 release = [