Fix library version support
@@ -87,8 +87,25 @@ See the [official document](http://www.rdkit.org/docs/Install.html)
for installation.
If you have setup `anaconda`, you may install `rdkit` by following command.
-```conda install -c rdkit rdkit```
+```conda install -c rdkit rdkit==2017.09.3.0```
+Note that we support specified version of RdKit.
+Latest version RdKit behavior may be different from supported version,
+and it is not supported.
+
+### Version table
+
+Chainer Chemistry is tested under following version of other library.
+
+| Chainer Chemistry | Chainer | RdKit *1 |
+| ------------------: | --------------: | -------------: |
+| v0.1.0 ~ v0.3.0 | v2.0 ~ v3.0 | 2017.09.3.0 |
+| master branch | v3.0 ~ v4.0 *1 | 2017.09.3.0 |
+
+[Footnote]
+
+*1: We used `FunctionNode` in [this PR](https://github.com/pfnet-research/chainer-chemistry/pull/190),
+which is introduced after chainer v3. See [this issue](https://github.com/pfnet-research/chainer-chemistry/issues/192) for details.
## Supported model
