diff --git a/environment-dev.yml b/environment-dev.yml
index 11d07aa2deb..0973c4bf27a 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -34,7 +34,8 @@ dependencies:
   - sqlalchemy>=1.4.0,<1.4.46
   - pandas-gbq>=0.15.0
   - pytables>=3.6.1
-  - pymssql>=2.1.5
+  # pymssql==2.2.8 broken: https://github.com/modin-project/modin/issues/6429
+  - pymssql>=2.1.5,!=2.2.8
   - psycopg2>=2.8.6
   - fastparquet>=0.6.3,<2023.1.0
   - tqdm>=4.60.0
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 74095c14899..c0603c34e89 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -24,7 +24,8 @@ matplotlib>=3.6.1
 sqlalchemy>=1.4.0,<1.4.46
 pandas-gbq>=0.15.0
 tables>=3.6.1
-pymssql>=2.1.5
+# pymssql==2.2.8 broken: https://github.com/modin-project/modin/issues/6429
+pymssql>=2.1.5,!=2.2.8
 psycopg2>=2.8.6
 connectorx>=0.2.6a4
 fastparquet>=0.6.3,<2023.1.0
diff --git a/requirements/env_unidist.yml b/requirements/env_unidist.yml
index 1a642739560..3e013e9942b 100644
--- a/requirements/env_unidist.yml
+++ b/requirements/env_unidist.yml
@@ -26,7 +26,8 @@ dependencies:
   - sqlalchemy>=1.4.0,<1.4.46
   - pandas-gbq>=0.15.0
   - pytables>=3.6.1
-  - pymssql>=2.1.5
+  # pymssql==2.2.8 broken: https://github.com/modin-project/modin/issues/6429
+  - pymssql>=2.1.5,!=2.2.8
   - psycopg2>=2.8.6
   - fastparquet>=0.6.3,<2023.1.0
   - tqdm>=4.60.0