diff --git a/contrib/seeds/.gitignore b/contrib/seeds/.gitignore
new file mode 100644
index 00000000000..e4a39d60934
--- /dev/null
+++ b/contrib/seeds/.gitignore
@@ -0,0 +1 @@
+seeds_main.txt
diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
index e8698994f1c..6d9d49ad2fc 100755
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -34,7 +34,8 @@ PATTERN_AGENT = re.compile(
     r"0.17.(0|0.1|1|2|99)|"
     r"0.18.(0|1|99)|"
     r"0.19.(0|1|99)|"
-    r"0.20.99"
+    r"0.20.(0|1|99)|"
+    r"0.21.99"
     r")")
 
 def parseline(line):