diff --git a/README.md b/README.md
index 0981656..220963a 100644
--- a/README.md
+++ b/README.md
@@ -147,12 +147,12 @@ model.run_model(ogs_exe="path/to/ogs")
 
 ## Requirements:
 
-- [NumPy >= 1.13.0](https://www.numpy.org)
-- [Pandas >= 0.23.0](https://pandas.pydata.org/)
-- [meshio >= 4.0; <5.0](https://github.com/nschloe/meshio)
-- [lxml](https://github.com/lxml/lxml)
-- [vtk](https://vtk.org/)
-- [pexpect](https://github.com/pexpect/pexpect)
+- [NumPy >= 1.14.5](https://www.numpy.org)
+- [Pandas >= 0.23.2](https://pandas.pydata.org/)
+- [meshio >= 4.0.3; <5.0](https://github.com/nschloe/meshio)
+- [lxml >= 4.0; <5.0](https://github.com/lxml/lxml)
+- [pexpect >= 4.0; <5.0](https://github.com/pexpect/pexpect)
+- [vtk >= 8.1](https://vtk.org/)
 
 ## Contact
 
diff --git a/docs/source/index.rst b/docs/source/index.rst
index a0b696e..9df35e7 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -143,12 +143,12 @@ Otherwise you need to specify the path to the executable within the run command:
 Requirements
 ============
 
-- `NumPy >= 1.13.0 <https://www.numpy.org>`_
-- `Pandas >= 0.23.0 <https://pandas.pydata.org/>`_
-- `meshio >= 4.0; <5.0 <https://github.com/nschloe/meshio>`_
-- `lxml <https://github.com/lxml/lxml>`_
-- `vtk <https://vtk.org/>`_
-- `pexpect <https://github.com/pexpect/pexpect>`_
+- `NumPy >= 1.14.5 <https://www.numpy.org>`_
+- `Pandas >= 0.23.2 <https://pandas.pydata.org/>`_
+- `meshio >= 4.0.3; <5.0 <https://github.com/nschloe/meshio>`_
+- `lxml >= 4.0; <5.0 <https://github.com/lxml/lxml>`_
+- `vtk >= 4.0; <5.0 <https://vtk.org/>`_
+- `pexpect >= 8.1 <https://github.com/pexpect/pexpect>`_
 
 
 License