diff --git a/CHANGELOG.md b/CHANGELOG.md
index 891af116..bf7506b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@
1. [#241](https://github.com/influxdata/influxdb-client-python/pull/241): Add detail error message for not supported type of `Point.field`
1. [#238](https://github.com/influxdata/influxdb-client-python/pull/238): Add possibility to specify default `timezone` for datetimes without `tzinfo`
+### Documentation
+1. [#255](https://github.com/influxdata/influxdb-client-python/pull/255): Fix invalid description for env var `INFLUXDB_V2_CONNECTION_POOL_MAXSIZE`
+
## 1.17.0 [2021-04-30]
### Features
diff --git a/README.rst b/README.rst
index c1e16ee4..ee7b13c6 100644
--- a/README.rst
+++ b/README.rst
@@ -201,7 +201,7 @@ Supported properties are:
- ``INFLUXDB_V2_TIMEOUT`` - socket timeout in ms (default value is 10000)
- ``INFLUXDB_V2_VERIFY_SSL`` - set this to false to skip verifying SSL certificate when calling API from https server
- ``INFLUXDB_V2_SSL_CA_CERT`` - set this to customize the certificate file to verify the peer
-- ``INFLUXDB_V2_CONNECTION_POOL_MAXSIZE`` - set this to customize the certificate file to verify the peer
+- ``INFLUXDB_V2_CONNECTION_POOL_MAXSIZE`` - set the number of connections to save that can be reused by urllib3
.. code-block:: python
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