diff --git a/README.md b/README.md
index 190fa10..ce030da 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Isolated and reproducible development environment for the Stackrox stack using N
 Compilers / runtimes:
 
 * `gcc`
-* `golang 1.20.x`
+* `golang 1.21.x`
 * `openjdk 11`
 * `python 3.10`
 
diff --git a/flake.nix b/flake.nix
index 8eac395..efc3cbd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -80,7 +80,7 @@
             pkgs.cachix
             pkgs.gcc
             pkgs.gnumake
-            pkgs.go_1_20
+            pkgs.go_1_21
             pkgs.jq
             pkgs.jsonnet-bundler
             pkgs.go-jsonnet