diff --git a/contrib/seeds/README.md b/contrib/seeds/README.md
index aa97dafdb..afe902fd7 100644
--- a/contrib/seeds/README.md
+++ b/contrib/seeds/README.md
@@ -3,6 +3,9 @@
 Utility to generate the seeds.txt list that is compiled into the client
 (see [src/chainparamsseeds.h](/src/chainparamsseeds.h) and other utilities in [contrib/seeds](/contrib/seeds)).
 
+Be sure to update `PATTERN_AGENT` in `makeseeds.py` to include the current version,
+and remove old versions as necessary.
+
 The seeds compiled into the release are created from sipa's DNS seed data, like this:
 
     curl -s http://bitcoin.sipa.be/seeds.txt > seeds_main.txt
diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
index 33fbb5851..34f0f5767 100755
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -30,7 +30,7 @@ import collections
 PATTERN_IPV4 = re.compile(r"^((\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})):(\d+)$")
 PATTERN_IPV6 = re.compile(r"^\[([0-9a-z:]+)\]:(\d+)$")
 PATTERN_ONION = re.compile(r"^([abcdefghijklmnopqrstuvwxyz234567]{16}\.onion):(\d+)$")
-PATTERN_AGENT = re.compile(r"^(\/Satoshi:0\.8\.6\/|\/Satoshi:0\.9\.(2|3|4|5)\/|\/Satoshi:0\.10\.\d{1,2}\/|\/Satoshi:0\.11\.\d{1,2}\/)$")
+PATTERN_AGENT = re.compile(r"^(/Satoshi:0.12.(0|1|99)/|/Satoshi:0.13.(0|1|2|99)/)$")
 
 def parseline(line):
     sline = line.split()