diff --git a/Formula/libmseed.rb b/Formula/libmseed.rb
index c884dd3..c914a65 100644
--- a/Formula/libmseed.rb
+++ b/Formula/libmseed.rb
@@ -1,8 +1,8 @@
 class Libmseed < Formula
   desc "Library for the miniSEED data format"
   homepage "https://iris-edu.github.io/libmseed"
-  url "https://github.com/iris-edu/libmseed/archive/refs/tags/v2.19.8.tar.gz"
-  sha256 "10ac972cb4e76c8d6aa27bf9f56fc59d1922991477d9ddefd375b89dba9e93f6"
+  url "https://github.com/iris-edu/libmseed/archive/refs/tags/v3.1.1.tar.gz"
+  sha256 "76c4ad6e27c9ded98e63c08647a988d5f18441ca75a81356b52ad3b9b4117acc"
   license "Apache-2.0"
 
   def install