diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67b37e2..c32ae5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,13 @@ We are currently working on porting this changelog to the specifications in
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## Version 1.1.5 - Unreleased
+## Version 1.1.6 - Unreleased
+
+### Fixed
+* Fixed passing of `flags` as keyword argument to `re.sub` for python 3.13 compliance.
+
+
+## Version 1.1.5 - Released 2024-06-08
 
 ### Changed
 * Minor modification to `xdoctest --version-info` and exposed it in CLI help.
diff --git a/src/xdoctest/checker.py b/src/xdoctest/checker.py
index 2ad1747..e1032e6 100644
--- a/src/xdoctest/checker.py
+++ b/src/xdoctest/checker.py
@@ -634,7 +634,7 @@ def remove_blankline_marker(text):
         '\n{marker}', '{marker}']).format(
             marker=BLANKLINE_MARKER, pos_lb=pos_lb)
     # blankline_pattern = r'(?<=\n)[ ]*{}\n?'.format(re.escape(BLANKLINE_MARKER))
-    new_text = re.sub(blankline_pattern, '\n', text, re.MULTILINE)
+    new_text = re.sub(blankline_pattern, '\n', text, flags=re.MULTILINE)
     return new_text