diff --git a/build-caching b/build-caching
index 2b0f1f1af..cda7c33a4 100755
--- a/build-caching
+++ b/build-caching
@@ -4,7 +4,7 @@
 # vim: syntax=python
 if type python >/dev/null 2>&1
 then
-  if python -V 2>&1 | grep "Python 2\.[0-6]" >/dev/null
+  if python -V 2>&1 | grep "Python 2\.[0-5]" >/dev/null
   then
     echo "Python to old" 1>&2
     [ "$1" = "put" ] && exit 0