diff --git a/README.md b/README.md
index 6f63d973..c85a782d 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ Config](https://github.com/brimdata/brimcap/wiki/Custom-Brimcap-Config) article.
 
 ## Build From Source
 
-To build from source, Go 1.21 or later is required.
+To build from source, Go 1.23 or later is required.
 
 To build the brimcap package, clone this repo and run `make build`:
 
diff --git a/go.mod b/go.mod
index d82c8fa0..89c58eda 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/brimdata/brimcap
 
-go 1.21
+go 1.23
 
 require (
 	github.com/brimdata/zed v1.18.1-0.20241003172836-b8fe31212be5