diff --git a/CHANGELOG.md b/CHANGELOG.md
index bdbe7c78..5de442ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.0.1] - Unreleased
+
+### Fixed
+
+- Fixed deprecation warnings re backslash https://github.com/willmcgugan/rich/issues/210
+- Fixed repr highlighting of scientific notation, e.g. 1e100
+
 ## [5.0.0] - 2020-08-02
 
 ### Changed
diff --git a/rich/highlighter.py b/rich/highlighter.py
index b4c1adc0..e5556ade 100644
--- a/rich/highlighter.py
+++ b/rich/highlighter.py
@@ -75,7 +75,7 @@ class ReprHighlighter(RegexHighlighter):
         r"(?P<tag_start>\<)(?P<tag_name>\w*)(?P<tag_contents>.*?)(?P<tag_end>\>)",
         r"(?P<attrib_name>\w+?)=(?P<attrib_value>\"?[\w_]+\"?)",
         r"(?P<bool_true>True)|(?P<bool_false>False)|(?P<none>None)",
-        r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*\b)",
+        r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[\-\+]?\d+?)?\b)",
         r"(?P<number>0x[0-9a-f]*)",
         r"(?P<path>\B(\/[\w\.\-\_\+]+)*\/)(?P<filename>[\w\.\-\_\+]*)?",
         r"(?<!\\)(?P<str>b?\'\'\'.*?(?<!\\)\'\'\'|b?\'.*?(?<!\\)\'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
@@ -105,3 +105,7 @@ if __name__ == "__main__":  # pragma: no cover
     console.print("foo /foo/bar/baz/egg.py word")
     console.print("foo /foo/bar/ba._++z/egg+.py word")
     console.print("https://example.org?foo=bar")
+
+    console.print(1234567.34)
+    console.print(1 / 2)
+    console.print(-1 / 123123123123)
diff --git a/rich/progress.py b/rich/progress.py
index 269a7009..4d0ffea3 100644
--- a/rich/progress.py
+++ b/rich/progress.py
@@ -16,7 +16,6 @@ from typing import (
     Deque,
     Dict,
     Iterable,
-    Iterator,
     List,
     NamedTuple,
     NewType,