diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b56ef4a..ecce9ac6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.10.0-4] - 2021-02-16
+### Fixed
+- Problem using Python 3.6 (ZipFile's compresslevel arg needs 3.7)
+
 ## [0.10.0-3] - 2021-02-16
 ### Fixed
 - Problem using Python 3.6 (StreamHandler.setStream introduced in 3.7)
diff --git a/debian/changelog b/debian/changelog
index 926262f5..5214ce62 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+kibot (0.10.0-4) stable; urgency=medium
+
+  * Fixed problem using Python 3.6
+    (ZipFile's compresslevel argument introduced in 3.7)
+
+ -- Salvador E. Tropea <salvador@inti.gob.ar>  Tue, 16 Feb 2021 12:51:24 -0300
+
 kibot (0.10.0-3) stable; urgency=medium
 
   * Fixed problem using Python 3.6 (#52)
diff --git a/kibot/out_compress.py b/kibot/out_compress.py
index 1900e474..f1cd016d 100644
--- a/kibot/out_compress.py
+++ b/kibot/out_compress.py
@@ -6,6 +6,7 @@
 import re
 import os
 import glob
+import sys
 from sys import exit
 from subprocess import check_output, STDOUT, CalledProcessError
 from zipfile import ZipFile, ZIP_STORED, ZIP_DEFLATED, ZIP_BZIP2, ZIP_LZMA
@@ -68,7 +69,11 @@ class CompressOptions(BaseOptions):
             logger.warning(W_EMPTYZIP+'No files provided, creating an empty archive')
 
     def create_zip(self, output, files):
-        with ZipFile(output, 'w', compression=self.ZIP_ALGORITHMS[self.compression], compresslevel=9) as zip:
+        extra = {}
+        extra['compression'] = self.ZIP_ALGORITHMS[self.compression]
+        if sys.version_info.major > 3 or (sys.version_info.major == 3 and sys.version_info.minor >= 7):
+            extra['compresslevel'] = 9
+        with ZipFile(output, 'w', **extra) as zip:
             for fname, dest in files.items():
                 logger.debug('Adding '+fname+' as '+dest)
                 zip.write(fname, dest)