diff --git a/go.mod b/go.mod
index ef632d2..e3baa26 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,8 @@
 module github.com/mmb/tmpbbs
 
-go 1.26
+go 1.27
 
-toolchain go1.26.6
+toolchain go1.27.1
 
 require (
 	github.com/derekparker/trie v0.0.0-20230829180723-39f4de51ef7d
diff --git a/tests/integration/go.mod b/tests/integration/go.mod
index 8614eb1..2bfebab 100644
--- a/tests/integration/go.mod
+++ b/tests/integration/go.mod
@@ -1,8 +1,8 @@
 module github.com/mmb/tmpbbs/tests/integration
 
-go 1.26
+go 1.27
 
-toolchain go1.26.6
+toolchain go1.27.1
 
 require (
 	github.com/chromedp/cdproto v0.0.0-20260714215040-dc233986426f
diff --git a/tools/go.mod b/tools/go.mod
index 3a9343d..38836ee 100644
--- a/tools/go.mod
+++ b/tools/go.mod
@@ -1,8 +1,8 @@
 module github.com/mmb/tmpbbs/tools
 
-go 1.26
+go 1.27
 
-toolchain go1.26.6
+toolchain go1.27.1
 
 tool (
 	golang.org/x/text/cmd/gotext