diff --git a/setup.py b/setup.py
index 83688e9..be4bb45 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setup(
     name='circlator',
-    version='1.3.1',
+    version='1.4.0',
     description='circlator: a tool to circularise genome assemblies',
     packages = find_packages(),
     package_data={'circlator': ['data/*']},
@@ -21,7 +21,7 @@
         'openpyxl',
         'pyfastaq >= 3.12.1',
         'pysam >= 0.8.1',
-        'pymummer>=0.7.1',
+        'pymummer>=0.9.0',
     ],
     license='GPLv3',
     classifiers=[