diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1d8b439d..a79229be 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -59,7 +59,7 @@ jobs:
 
       - name: Flake code
         run: |
-          python -m pip install flake8 Flake8-pyproject flake8-typing-imports
+          python -m pip install 'flake8<=6.0.0' Flake8-pyproject flake8-typing-imports
           python -m flake8 src tests
 
       - name: Check import ordering
diff --git a/dev-environment.yml b/dev-environment.yml
index d916af88..454ff688 100644
--- a/dev-environment.yml
+++ b/dev-environment.yml
@@ -43,7 +43,7 @@ dependencies:
   - autopep8
   - black
   - build
-  - flake8
+  - flake8 <= 6.0.0
   - flake8-typing-imports
   - isort
   - myst-nb
diff --git a/pyproject.toml b/pyproject.toml
index 833f5d37..e61569b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ dev = [
     "autopep8",
     "black",
     "build",
-    "flake8",
+    "flake8 <= 6.0.0",
     "flake8-pyproject",
     "flake8-typing-imports",
     "isort",