diff --git a/pyproject.toml b/pyproject.toml
index 85f4b38..7ffc6e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ google-cloud-logging = "^3.8.0"
 
 [tool.poetry.group.dev.dependencies]
 black = "^23.9.1"
-flake8 = "^6.1.0"
+flake8 = ">=6.1,<8.0"
 coverage = "^7.3.1"
 pytest = "^7.4.2"
 snakemake = {git = "https://github.com/snakemake/snakemake.git", branch="main"}