diff -urN a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml	2020-12-10 22:20:53.000000000 +0100
+++ b/pyproject.toml	2021-04-06 09:37:08.386031859 +0200
@@ -18,18 +18,18 @@
 
 # https://python-poetry.org/docs/versions/
 [tool.poetry.dependencies]
-python = ">= 3.6.1, < 4.0.0"
-toml = ">= 0.9, < 1.0.0"
-NiaPy = { version = "2.0.0rc10" }
-scikit-learn = ">= 0.22, < 1.0.0"
-numpy = ">= 1.18, < 2.0.0"
-matplotlib = ">= 3.2, < 4.0.0"
-seaborn = ">= 0.10, < 1.0.0"
-pandas = ">= 1.0, < 2.0.0"
+python = "*"
+toml = "*"
+NiaPy = "*"
+scikit-learn = "*"
+numpy = "*"
+matplotlib = "*"
+seaborn = "*"
+pandas = "*"
 
 [tool.poetry.dev-dependencies]
-flake8 = "^3.8.1"
-coverage = "^5.1"
+flake8 = "*"
+coverage = "*"
 [build-system]
 requires = ["poetry"]
 build-backend = "poetry.masonry.api"