diff --git a/pyproject.toml b/pyproject.toml
index a69d0b5..dd9c60b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ homepage = "https://github.com/eccenca/cmem-plugin-pyshacl"
 
 [tool.poetry.dependencies]
 python = "^3.9"
-cmem-plugin-base = ">=3.0.0,<5.0.0"
+cmem-plugin-base = ">=3.1.0,<5.0.0"
 pyshacl = "^0.22.2"
 validators = "^0.20.0"
 requests-toolbelt = "^0.10.1"