diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 658c0957f..2adfeba3e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -58,7 +58,7 @@ In order to manage this, changelog entries are stored as text files in the `.cha
 
 To add a new changelog entry, you can simply run `python3 ./script/changelog.py add "Fixed thingo to increase zorbloxification [Issue #2](http://example.com)`
 
-This creates a file named `./changelogs/yyyy-mm-dd-branchname.txt` (timestamp, current git branch) which contains a markdown snippet.
+This creates a file named `./changelogs/yyyy-mm-dd-branchname.md` (timestamp, current git branch) which contains a markdown snippet.
 
 If you don't have a Python 3 intepreter installed, you can simply create this file manually. It should contain a list item like `- Fixed thingo [...]`
 
diff --git a/scripts/changelog.py b/scripts/changelog.py
index 5775d99c0..0eac4fa35 100755
--- a/scripts/changelog.py
+++ b/scripts/changelog.py
@@ -22,7 +22,7 @@ def get_changefiles() -> List[str]:
     changedir = get_dir()
     changefiles = []
     for f in os.listdir(changedir):
-        if f.endswith(".txt") and not f.startswith("."):
+        if f.endswith(".md") and not f.startswith("."):
             changefiles.append(os.path.join(changedir, f))
 
     return changefiles
@@ -34,7 +34,7 @@ def cmd_add(args):
 
     timestamp = ymd()
     branchname = git_current_branch()
-    fname = os.path.join(get_dir(), "%s-%s.txt" % (timestamp, branchname))
+    fname = os.path.join(get_dir(), "%s-%s.md" % (timestamp, branchname))
     with open(fname, "a") as f:
         f.write(text)
         f.write("\n")