diff --git a/.tool-versions b/.tool-versions
index f3ab914..1e576d1 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-golang 1.20
+golang 1.21.7
diff --git a/Dockerfile b/Dockerfile
index c089fe8..a315634 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.20 as builder
+FROM golang:1.21 as builder
 
 ENV CGO_ENABLED="0" \
     GOOS="linux" \