diff --git a/environment.yml b/environment.yml
index a7eb027..55b3899 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,8 +7,12 @@ dependencies:
 - flask<2.0.0,>=1.0.2
 - psutil
 - black
+- twine
+- isort
 - coverage
 - pip
 - pip:
-  - flask-api
+  - pre_commit
+  - flask-api==2.0
+  - werkzeug==1.0.1
   - cellxgene>=0.15
diff --git a/requirements.txt b/requirements.txt
index 90d07a1..3b45a37 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 cellxgene>=0.15
 flask<2.0.0,>=1.0.2
-flask_api
+flask-api==2.0
+werkzeug==1.0.1
 psutil
 requests