diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 1e08f0f..15d4bb6 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -54,7 +54,7 @@ jobs:
           python -m pip install isort
       - name: isort check
         run: |
-          isort --recursive --check-only .
+          isort --check-only .
   test:
     name: ${{ matrix.python-version }}-build
     runs-on: ubuntu-latest
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7dc8a9c..429f681 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.5.0
+    rev: v3.1.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
@@ -9,26 +9,26 @@ repos:
       - id: check-yaml
       - id: double-quote-string-fixer
 
-  - repo: https://github.com/ambv/black
-    rev: 19.10b0
-    hooks:
-      - id: black
-        args: ["--line-length", "100", "--skip-string-normalization"]
-
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.7.9
+    rev: 3.8.3
     hooks:
       - id: flake8
   - repo: https://github.com/asottile/seed-isort-config
-    rev: v1.9.4
+    rev: v2.2.0
     hooks:
       - id: seed-isort-config
   - repo: https://github.com/pre-commit/mirrors-isort
-    rev: v4.3.21
+    rev: v5.0.9
     hooks:
       - id: isort
 
+  - repo: https://github.com/ambv/black
+    rev: 19.10b0
+    hooks:
+      - id: black
+        args: ["--line-length", "100", "--skip-string-normalization"]
+
   - repo: https://github.com/prettier/prettier
-    rev: 1.19.1
+    rev: 2.0.5
     hooks:
       - id: prettier
diff --git a/ci/py38.yml b/ci/py38.yml
index bef01fb..e6e6259 100644
--- a/ci/py38.yml
+++ b/ci/py38.yml
@@ -6,4 +6,4 @@ dependencies:
   - dask
   - pytest
   - scikit-learn
-  - xarray
+  - xarray>=0.16
diff --git a/setup.cfg b/setup.cfg
index c8ccb8e..1551f74 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,7 @@ setup_requires =
 [flake8]
 exclude = docs
 ignore = E203,E266,E501,W503,F401,E722,E402,C901
-max-line-length = 80
+max-line-length = 88
 max-complexity = 18
 select = B,C,E,F,W,T4,B9