diff --git a/ankipandas/__init__.py b/ankipandas/__init__.py
index 31296f0..6d23266 100644
--- a/ankipandas/__init__.py
+++ b/ankipandas/__init__.py
@@ -25,5 +25,5 @@
         "developers, so AnkiPandas has decided to drop support of python "
         " < 3.6. We strongly encourage you to update your python version to "
         "receive updates.",
-        ".".join(sys.version_info),
+        ".".join(map(str, sys.version_info)),
     )