diff --git a/pyproject.toml b/pyproject.toml
index 1507602..c57e848 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ msrest = "^0.7.1"
 
 [tool.poetry.group.dev.dependencies]
 black = ">=23.9.1,<25.0.0"
-flake8 = "^6.1.0"
+flake8 = ">=6.1,<8.0"
 coverage = "^7.3.1"
 pytest = ">=7.4.2,<9.0.0"
 snakemake = {git = "https://github.com/snakemake/snakemake.git"}