diff --git a/.mise-go-version.sh b/.mise-go-version.sh
new file mode 100755
index 0000000000..3ea76554ed
--- /dev/null
+++ b/.mise-go-version.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+set -euo pipefail
+
+# Purpose of this script is to parse the go.mod file to retrieve the version of
+# Go that we are using, either from a "toolchain" directive (preferred), or from
+# a "go" directive as a fallback.
+#
+# The script then outputs that version, where it will be picked up as an environment
+# variable in mise.
+
+F="./go.mod"
+
+AWK=awk
+# prefer 'gawk' over 'awk' to make sure we get GNU awk
+command -v gawk &>/dev/null && AWK=gawk
+
+[[ -e $F ]] || { echo "ERROR: failed to find $F" >&2; exit 1;}
+
+GO_VERSION=$("$AWK" '/^toolchain/ {print $2; exit} /^go / {print $2}' "$F")
+GO_VERSION=${GO_VERSION#go} # strip the potential 'go' prefix:
+echo "${GO_VERSION}"
diff --git a/mise.toml b/mise.toml
index 3f785a530d..2cc6ebb761 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,5 +1,8 @@
+[env]
+GO_VERSION = "{{ exec(command='./.mise-go-version.sh') }}"
+
 [tools]
-go = "1.25.9"
+go = "{{ env.GO_VERSION }}"
 node = "24"
 pnpm = "11.1.3"
 "go:github.com/go-delve/delve/cmd/dlv" = "1.27.1"