diff --git a/pyproject.toml b/pyproject.toml
index fff106b..0034302 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ test-filesource = ["pyyaml", "watchdog"]
 [tool.poetry.group.dev.dependencies]
 mock = ">=2.0.0"
 pytest = ">=2.8"
-redis = ">=2.10.5,<3.0.0"
+redis = ">=2.10.5,<6.0.0"
 boto3 = ">=1.9.71,<2.0.0"
 coverage = ">=4.4"
 jsonpickle = ">1.4.1"