diff --git a/build-go.sh b/build-go.sh
index e59e874..6135772 100755
--- a/build-go.sh
+++ b/build-go.sh
@@ -10,11 +10,16 @@ url="https://github.com/golang/go/archive"
 
 v14="go1.4.3"
 v14_sum="65e8d2ea08447f02f8b6ab63778e4d98586ac4fd676401dae0eda494c7829965"
-bootstrap="${install_dir}/bootstrap-${v14}"
+v14_bootstrap="${install_dir}/bootstrap-${v14}"
 tgz14="${v14}.tar.gz"
 path_v14="${install_dir}/${tgz14}"
+v19="go1.19.6"
+v19_sum="0c7f4e6d2de3ae07d60377754955842ad357b0366df01116554fc619b1e99672"
+v19_bootstrap="${install_dir}/bootstrap-${v19}"
+tgz19="${v19}.tar.gz"
+path_v19="${install_dir}/${tgz19}"
 
-v="${1-1.19}"
+v="${1-1.20.1}"
 case "${v}" in
   1.16.7) new_sum="07502f16366fbc697b1b09b842d29116e6d6607c9dc42b1d7c54b96f528c7952";;
   1.17.1) new_sum="670ce36e100669f9be572a1603858ce4a64eb4b21a31fa5cdefb778609c40337";;
@@ -25,9 +30,15 @@ case "${v}" in
   1.18.2) new_sum="b76e590857060fdc575a37d4204c15df33de6d23e49d5cf9bdce93083e4dcddb";;
   1.18.3) new_sum="cc0e73239f5bc1521de9ddc54f46eb0e69cc41faabe3f468865483bb0f844b68";;
   1.18.4) new_sum="283442519c28f5c24dd8c849ebe0570a3ad92cd94610378b33b2053f60391fdf";;
+  1.18.5) new_sum="30c07c08c9b9a79d652272ac3298c249a810a4c908e8937cf5e58d2414af1cc3";;
   1.19)   new_sum="6ac64f39e3f477ac793896437237e84b06d67c7657fbb34abcdbf73c77f6b7a3";;
+  1.19.1) new_sum="884439c3de751c705e47a120af6b92b65770a952a7b8788244bc6d73b2548c3e";;
+  1.19.5) new_sum="1c24a6a2bf71d64d0ca8e228028d6108521f06b6edc7bf6b34ed6d767a795809";;
+  1.19.6) new_sum="0c7f4e6d2de3ae07d60377754955842ad357b0366df01116554fc619b1e99672";;
+  1.20.1) new_sum="5db737840a740457c1b4b73b90dad6daa57af0da420f3ea51c39a1a81abbcc41";;
   *) errx "no hash found for version ${v}";;
 esac
+[[ "${v}" =~ 1\.2* ]] && v1_20=1 || v1_20=0
 
 new="go${v}"
 new_dir="${install_dir}/go-${new}"
@@ -36,11 +47,18 @@ path_new="${install_dir}/${tgznew}"
 
 rm -f ${go_dir}
 
-if [[ ! -d "${bootstrap}" ]]; then
+if [[ ! -d "${v14_bootstrap}" ]]; then
   curl -sSL "${url}/${tgz14}" >${path_v14}
   [[ "$(sha256sum ${path_v14}|cut -d" " -f1)" != "${v14_sum}" ]] && errx "wrong checksum: ${path_v14}"
   tar xfz ${path_v14} -C ${install_dir}
-  mv ${install_dir}/go-${v14} ${bootstrap}
+  mv ${install_dir}/go-${v14} ${v14_bootstrap}
+fi
+
+if [[ "${v1_20}" -eq 1 ]] && [[ ! -d "${v19_bootstrap}" ]]; then
+  curl -sSL "${url}/${tgz19}" >${path_v19}
+  [[ "$(sha256sum ${path_v19}|cut -d" " -f1)" != "${v19_sum}" ]] && errx "wrong checksum: ${path_v19}"
+  tar xfz ${path_v19} -C ${install_dir}
+  mv ${install_dir}/go-${v19} ${v19_bootstrap}
 fi
 
 if [[ ! -d "${new_dir}" ]]; then
@@ -52,12 +70,19 @@ fi
 
 export CGO_ENABLED=0
 
-if [[ ! -x "${bootstrap}/bin/go" ]]; then
-  cd ${bootstrap}/src
+if [[ ! -x "${v14_bootstrap}/bin/go" ]]; then
+  cd ${v14_bootstrap}/src
+  ./make.bash
+fi
+
+if [[ "${v1_20}" -eq 1 ]] && [[ ! -x "${v19_bootstrap}/bin/go" ]]; then
+  export GOROOT_BOOTSTRAP=${v14_bootstrap}
+  cd ${v19_bootstrap}/src
   ./make.bash
 fi
 
 if [[ ! -x "${new_dir}/bin/go" ]]; then
+  [[ "${v1_20}" -eq 1 ]] && bootstrap=${v19_bootstrap} || bootstrap=${v14_bootstrap}
   export GOROOT_BOOTSTRAP=${bootstrap}
   [[ "$(uname -m)" == "x86_64" ]] && export GOARCH=amd64 || export GOARCH=386
   cd ${new_dir}/src