diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0688a57..1c30115 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,7 +25,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.11.0
+    rev: v2.15.0
     hooks:
       - id: pyupgrade
         args: [--py36-plus]
@@ -39,12 +39,12 @@ repos:
       - id: rst-directive-colons
       - id: rst-inline-touching-normal
   - repo: https://github.com/psf/black
-    rev: 20.8b1
+    rev: 21.5b0
     hooks:
       - id: black
         args: [--quiet, --target-version=py36]
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.0
+    rev: 3.9.2
     hooks:
       - id: flake8
         additional_dependencies: [flake8-bugbear]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45b40da..2caf946 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## 4.1.0 - 5/9/2021
+
+### New
+
+- HTTP connections are now re-used when possible (using [`httpx.Client()`](https://www.python-httpx.org/advanced/#client-instances)) to improve download performance.
+
+### Fixed
+
+- Requests are now retried at most 5 times if a request fails. This should solve the `500 Server Error`s that some users are experiencing when downloading a large number of filings.
+
+### Changed
+
+- Replaced the internal `requests` package with [`httpx`](https://github.com/encode/httpx), a more modern and performant alternative.
+
 ## 4.0.3 - 4/6/2021
 
 ### Fixed
diff --git a/sec_edgar_downloader/_version.py b/sec_edgar_downloader/_version.py
index c7a18d1..7039708 100644
--- a/sec_edgar_downloader/_version.py
+++ b/sec_edgar_downloader/_version.py
@@ -1 +1 @@
-__version__ = "4.0.3"
+__version__ = "4.1.0"