diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 2fbb97552b00e8fedeb1e98e29d433ec91b486ab..647be7f4332e15560577bcd18e7b3717a284eca4 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -2,6 +2,6 @@
 
 Fixes # <!-- you may add issues here to automatically close them -->
 
-1. [ ] Feature description was added to the [changelog](https://github.com/ufz/ogs/wiki/Release-notes-6.3.0)
+1. [ ] Feature description was added to the [changelog](https://github.com/ufz/ogs/wiki/Release-notes-6.3.1)
 2. [ ] Tests covering your feature were added?
 3. [ ] Any new feature or behavior change was documented?
diff --git a/web/content/releases/6.3.0.md b/web/content/releases/6.3.0.md
new file mode 100644
index 0000000000000000000000000000000000000000..a914e48577aa3e86c379571f5fa28f6bd3a4bc68
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+++ b/web/content/releases/6.3.0.md
@@ -0,0 +1,91 @@
++++
+date = "2020-03-11T11:00:13+01:00"
+title = "OpenGeoSys 6.3.0"
+tag = "6.3.0"
+author = "Lars Bilke"
+release_date = "2020-03-11"
+
+[downloads]
+win = [
+    "Windows-10.0.14393-x64-de-utils.zip",
+    "Windows-10.0.14393-x64-python-de-utils.zip"
+]
+linux = [
+    "Linux-5.3.7-arch1-2-ARCH-x64-de-utils.tar.gz",
+    "Linux-5.3.7-arch1-2-ARCH-x64-python-de-utils.tar.gz",
+    "Linux-5.3.7-arch1-2-ARCH-x64-python-utils.tar.gz",
+]
+osx = [ "OSX-10.15-x64-utils.tar.gz" ]
+container = [
+    "serial.sif",
+    "openmpi-2.1.6.sif",
+    "openmpi-3.1.4.sif",
+    "openmpi-4.0.1.sif"
+]
+note = """
+**Note:** When using Python bindings make sure to have Python installed on your system:
+
+- Windows: [Python 3.7.2](https://www.python.org/ftp/python/3.7.2/python-3.7.2-amd64-webinstall.exe)
+- Linux: Python 3.6.8
+"""
++++
+
+> In this release the Material Property Library is significantly enriched with new constitutive relations and gets wide use in the processes.
+>
+> Other significant changes are:
+
+## Features
+
+### Process' changes
+ - Richards mechanics process now correctly computes porosity changes in presence of swelling. [#2825](https://github.com/ufz/ogs/pull/2825)
+ - HydroMechanics process has now the option to use mass lumping. [#2826](https://github.com/ufz/ogs/pull/2826)
+ - HydroMechanics process now uses permeability in tensor form with corresponding output. [#2848](https://github.com/ufz/ogs/pull/2848)
+ - Reactive transport process has a mesh tag for restricting the place where chemical reactions take place within a specified subdomain. [#2851](https://github.com/ufz/ogs/pull/2851)
+
+#### Numerics
+ - Pass `x_dot` to processes' assemble functions. Used by rate-dependent material models. [#2795](https://github.com/ufz/ogs/pull/2795)
+ - triangular elements with 7 integration points (order 4). [#2798](https://github.com/ufz/ogs/pull/2798)
+
+#### Input and output
+
+- Output of surface fluxes (for 2D and 3D bulk domains) for balance computations is now available for LiquidFlow process. [#2760](https://github.com/ufz/ogs/pull/2760)
+ - Compute and output element-average porosity in RichardsMechanics process. [#2803](https://github.com/ufz/ogs/pull/2803)
+ - Output of fixed time when using IterationBasedTimeStepping is now available. [#2831](https://github.com/ufz/ogs/pull/2831)
+
+### Material models
+
+ - Enable orthotropy in MFront solid material model interface. [#2774](https://github.com/ufz/ogs/pull/2774)
+ - Enable shared medium definition for multiple materials. [#2786](https://github.com/ufz/ogs/pull/2786)
+ - Implement van Genuchten saturation and relative permeability models in MPL. [#2788](https://github.com/ufz/ogs/pull/2788)
+ - Convert processes to use MPL for the fluid and porous media models:
+   - Hydro-mechanics. [#2779](https://github.com/ufz/ogs/pull/2779)
+   - Richards-mechanics. [#2787](https://github.com/ufz/ogs/pull/2787)
+   - LiquidFlow. [#2807](https://github.com/ufz/ogs/pull/2807)
+   - GroundwaterFlow. [#2820](https://github.com/ufz/ogs/pull/2820)
+ - Pass time increment dt to the material models. [#2801](https://github.com/ufz/ogs/pull/2801)
+ - Add initialValue(x, t) for material properties. [#2804](https://github.com/ufz/ogs/pull/2804)
+ - Implement mass balance porosity, used in RichardsMechanics. [#2804](https://github.com/ufz/ogs/pull/2804), [#2829](https://github.com/ufz/ogs/pull/2829)
+ - Orthotropic permeability power law, used in RichardsMechanics. [#2813](https://github.com/ufz/ogs/pull/2813)
+ - Implement saturation dependent swelling, used in RichardsMechanics. [#2819](https://github.com/ufz/ogs/pull/2819), [#2832](https://github.com/ufz/ogs/pull/2832)
+ - Bishop's effective stress models; power law and saturation cutoff, used in RichardsMechanics. [#2823](https://github.com/ufz/ogs/pull/2823)
+
+### File I/O
+
+### Testing and documentation
+- A new test verifies the correct conversion from *PropertyType* enum to string and back. [#2770](https://github.com/ufz/ogs/pull/2770)
+
+### New tools
+
+- ExtractEntireSurface: The tool extracts either lines in case of a 2D bulk mesh as input or quads/triangles in case of a 3D bulk mesh as input. [#2764](https://github.com/ufz/ogs/pull/2764)
+
+## Infrastructure
+
+- Added a Code of Conduct. [#2834](https://github.com/ufz/ogs/pull/2834)
+
+### CMake options changes
+
+- Added version requirements file in json-format to have a single source used by CMake and the web site generator. [#2783](https://github.com/ufz/ogs/pull/2783)
+
+### Version info
+
+- See [versions.json](https://github.com/ufz/ogs/blob/6.3.0/web/data/versions.json)